From d58ca5743d4d1b464bf2f34a244a0b5f9569fbf3 Mon Sep 17 00:00:00 2001
From: Thomas Citharel <tcit@tcit.fr>
Date: Sun, 10 Oct 2021 16:25:50 +0200
Subject: [PATCH] Add timezone handling

Signed-off-by: Thomas Citharel <tcit@tcit.fr>
---
 js/package.json                               |   1 +
 js/src/components/Address/AddressInfo.vue     | 124 +++++++++++
 js/src/components/Event/EventFullDate.vue     | 186 ++++++++++++----
 js/src/components/Event/EventMap.vue          | 175 +++++++++++++++
 .../components/Event/EventMetadataSidebar.vue | 201 ++----------------
 .../Event/FullAddressAutoComplete.vue         | 152 +++++++------
 js/src/components/NavBar.vue                  |   9 +-
 js/src/filters/datetime.ts                    |   5 +-
 js/src/graphql/address.ts                     |   1 +
 js/src/graphql/config.ts                      |  25 +++
 js/src/graphql/event.ts                       |   1 +
 js/src/graphql/user.ts                        |  11 +
 js/src/i18n/en_US.json                        |  46 +++-
 js/src/i18n/fr_FR.json                        |  46 +++-
 js/src/types/address.model.ts                 |  16 +-
 js/src/types/event-options.model.ts           |   3 +
 js/src/types/event.model.ts                   |  21 +-
 js/src/views/Event/Edit.vue                   | 199 ++++++++++++++---
 js/src/views/Event/Event.vue                  |  35 ++-
 .../components/Post/PostElementItem.spec.ts   |   2 +-
 js/tsconfig.json                              |   2 +-
 js/yarn.lock                                  |   5 +
 lib/federation/activity_pub/actor.ex          |   4 +-
 lib/federation/activity_pub/permission.ex     |   2 +-
 lib/federation/activity_pub/types/events.ex   |   2 +-
 lib/graphql/api/events.ex                     |   6 +-
 .../middleware/current_actor_provider.ex      |   4 +-
 lib/graphql/resolvers/address.ex              |   2 +-
 lib/graphql/resolvers/event.ex                |  99 +++++++--
 lib/graphql/schema/address.ex                 |   2 +
 lib/graphql/schema/event.ex                   |   6 +-
 lib/mobilizon.ex                              |   1 +
 lib/mobilizon/addresses/address.ex            |  51 ++++-
 lib/mobilizon/events/event_options.ex         |   3 +
 lib/mobilizon/events/events.ex                |  19 +-
 lib/service/geospatial/addok.ex               |   5 +-
 lib/service/geospatial/google_maps.ex         |   5 +-
 lib/service/geospatial/map_quest.ex           |   5 +-
 lib/service/geospatial/mimirsbrunn.ex         |   3 +-
 lib/service/geospatial/nominatim.ex           |   3 +-
 lib/service/geospatial/pelias.ex              |   3 +-
 lib/service/geospatial/photon.ex              |   5 +-
 lib/service/geospatial/provider.ex            |  13 ++
 lib/service/metadata/event.ex                 |  54 ++++-
 lib/service/timezone_detector.ex              |  40 ++++
 lib/web/auth/context.ex                       |  33 +--
 mix.exs                                       |   1 +
 mix.lock                                      |   1 +
 ...211008084901_add_timezone_to_addresses.exs |   9 +
 49 files changed, 1218 insertions(+), 429 deletions(-)
 create mode 100644 js/src/components/Address/AddressInfo.vue
 create mode 100644 js/src/components/Event/EventMap.vue
 create mode 100644 lib/service/timezone_detector.ex
 create mode 100644 priv/repo/migrations/20211008084901_add_timezone_to_addresses.exs

diff --git a/js/package.json b/js/package.json
index 9e38573e..a3d4ca10 100644
--- a/js/package.json
+++ b/js/package.json
@@ -38,6 +38,7 @@
     "bulma-divider": "^0.2.0",
     "core-js": "^3.6.4",
     "date-fns": "^2.16.0",
+    "date-fns-tz": "^1.1.6",
     "graphql": "^15.0.0",
     "graphql-tag": "^2.10.3",
     "intersection-observer": "^0.12.0",
diff --git a/js/src/components/Address/AddressInfo.vue b/js/src/components/Address/AddressInfo.vue
new file mode 100644
index 00000000..a0ef9ead
--- /dev/null
+++ b/js/src/components/Address/AddressInfo.vue
@@ -0,0 +1,124 @@
+<template>
+  <address>
+    <b-icon
+      v-if="showIcon"
+      :icon="address.poiInfos.poiIcon.icon"
+      size="is-medium"
+      class="icon"
+    />
+    <p>
+      <span
+        class="addressDescription"
+        :title="address.poiInfos.name"
+        v-if="address.poiInfos.name"
+      >
+        {{ address.poiInfos.name }}
+      </span>
+      <br v-if="address.poiInfos.name" />
+      <span class="has-text-grey-dark">
+        {{ address.poiInfos.alternativeName }}
+      </span>
+      <br />
+      <small
+        v-if="
+          userTimezoneDifferent &&
+          longShortTimezoneNamesDifferent &&
+          timezoneLongNameValid
+        "
+        class="has-text-grey-dark"
+      >
+        🌐
+        {{
+          $t("{timezoneLongName} ({timezoneShortName})", {
+            timezoneLongName,
+            timezoneShortName,
+          })
+        }}
+      </small>
+      <small v-else-if="userTimezoneDifferent" class="has-text-grey-dark">
+        🌐 {{ timezoneShortName }}
+      </small>
+    </p>
+  </address>
+</template>
+<script lang="ts">
+import { IAddress } from "@/types/address.model";
+import { PropType } from "vue";
+import { Component, Prop, Vue } from "vue-property-decorator";
+
+@Component
+export default class AddressInfo extends Vue {
+  @Prop({ required: true, type: Object as PropType<IAddress> })
+  address!: IAddress;
+
+  @Prop({ required: false, default: false, type: Boolean }) showIcon!: boolean;
+  @Prop({ required: false, default: false, type: Boolean })
+  showTimezone!: boolean;
+  @Prop({ required: false, type: String }) userTimezone!: string;
+
+  get userTimezoneDifferent(): boolean {
+    return (
+      this.userTimezone != undefined &&
+      this.address.timezone != undefined &&
+      this.userTimezone !== this.address.timezone
+    );
+  }
+
+  get longShortTimezoneNamesDifferent(): boolean {
+    return (
+      this.timezoneLongName != undefined &&
+      this.timezoneShortName != undefined &&
+      this.timezoneLongName !== this.timezoneShortName
+    );
+  }
+
+  get timezoneLongName(): string | undefined {
+    return this.timezoneName("long");
+  }
+
+  get timezoneShortName(): string | undefined {
+    return this.timezoneName("short");
+  }
+
+  get timezoneLongNameValid(): boolean {
+    return (
+      this.timezoneLongName != undefined && !this.timezoneLongName.match(/UTC/)
+    );
+  }
+
+  private timezoneName(format: "long" | "short"): string | undefined {
+    return this.extractTimezone(
+      new Intl.DateTimeFormat(undefined, {
+        timeZoneName: format,
+        timeZone: this.address.timezone,
+      }).formatToParts()
+    );
+  }
+
+  private extractTimezone(
+    parts: Intl.DateTimeFormatPart[]
+  ): string | undefined {
+    return parts.find((part) => part.type === "timeZoneName")?.value;
+  }
+}
+</script>
+<style lang="scss" scoped>
+address {
+  font-style: normal;
+  display: flex;
+  justify-content: flex-start;
+
+  span.addressDescription {
+    text-overflow: ellipsis;
+    white-space: nowrap;
+    flex: 1 0 auto;
+    min-width: 100%;
+    max-width: 4rem;
+    overflow: hidden;
+  }
+
+  span.icon {
+    padding-right: 1rem;
+  }
+}
+</style>
diff --git a/js/src/components/Event/EventFullDate.vue b/js/src/components/Event/EventFullDate.vue
index 454a3949..33c1d617 100644
--- a/js/src/components/Event/EventFullDate.vue
+++ b/js/src/components/Event/EventFullDate.vue
@@ -18,64 +18,97 @@
 </docs>
 
 <template>
-  <span v-if="!endsOn">{{
-    beginsOn | formatDateTimeString(showStartTime)
-  }}</span>
-  <span v-else-if="isSameDay() && showStartTime && showEndTime">
-    {{
+  <p v-if="!endsOn">
+    <span>{{
+      formatDateTimeString(beginsOn, timezoneToShow, showStartTime)
+    }}</span>
+    <br />
+    <b-switch
+      size="is-small"
+      v-model="showLocalTimezone"
+      v-if="differentFromUserTimezone"
+    >
+      {{ singleTimeZone }}
+    </b-switch>
+  </p>
+  <p v-else-if="isSameDay() && showStartTime && showEndTime">
+    <span>{{
       $t("On {date} from {startTime} to {endTime}", {
         date: formatDate(beginsOn),
-        startTime: formatTime(beginsOn),
-        endTime: formatTime(endsOn),
+        startTime: formatTime(beginsOn, timezoneToShow),
+        endTime: formatTime(endsOn, timezoneToShow),
       })
-    }}
-  </span>
-  <span v-else-if="isSameDay() && !showStartTime && showEndTime">
-    {{
-      $t("On {date} ending at {endTime}", {
-        date: formatDate(beginsOn),
-        endTime: formatTime(endsOn),
-      })
-    }}
-  </span>
-  <span v-else-if="isSameDay() && showStartTime && !showEndTime">
+    }}</span>
+    <br />
+    <b-switch
+      size="is-small"
+      v-model="showLocalTimezone"
+      v-if="differentFromUserTimezone"
+    >
+      {{ singleTimeZone }}
+    </b-switch>
+  </p>
+  <p v-else-if="isSameDay() && showStartTime && !showEndTime">
     {{
       $t("On {date} starting at {startTime}", {
         date: formatDate(beginsOn),
         startTime: formatTime(beginsOn),
       })
     }}
-  </span>
-  <span v-else-if="isSameDay()">{{
-    $t("On {date}", { date: formatDate(beginsOn) })
-  }}</span>
-  <span v-else-if="endsOn && showStartTime && showEndTime">
-    {{
-      $t("From the {startDate} at {startTime} to the {endDate} at {endTime}", {
-        startDate: formatDate(beginsOn),
-        startTime: formatTime(beginsOn),
-        endDate: formatDate(endsOn),
-        endTime: formatTime(endsOn),
-      })
-    }}
-  </span>
-  <span v-else-if="endsOn && showStartTime">
-    {{
-      $t("From the {startDate} at {startTime} to the {endDate}", {
-        startDate: formatDate(beginsOn),
-        startTime: formatTime(beginsOn),
-        endDate: formatDate(endsOn),
-      })
-    }}
-  </span>
-  <span v-else-if="endsOn">
+  </p>
+  <p v-else-if="isSameDay()">
+    {{ $t("On {date}", { date: formatDate(beginsOn) }) }}
+  </p>
+  <p v-else-if="endsOn && showStartTime && showEndTime">
+    <span>
+      {{
+        $t(
+          "From the {startDate} at {startTime} to the {endDate} at {endTime}",
+          {
+            startDate: formatDate(beginsOn),
+            startTime: formatTime(beginsOn, timezoneToShow),
+            endDate: formatDate(endsOn),
+            endTime: formatTime(endsOn, timezoneToShow),
+          }
+        )
+      }}
+    </span>
+    <br />
+    <b-switch
+      size="is-small"
+      v-model="showLocalTimezone"
+      v-if="differentFromUserTimezone"
+    >
+      {{ multipleTimeZones }}
+    </b-switch>
+  </p>
+  <p v-else-if="endsOn && showStartTime">
+    <span>
+      {{
+        $t("From the {startDate} at {startTime} to the {endDate}", {
+          startDate: formatDate(beginsOn),
+          startTime: formatTime(beginsOn, timezoneToShow),
+          endDate: formatDate(endsOn),
+        })
+      }}
+    </span>
+    <br />
+    <b-switch
+      size="is-small"
+      v-model="showLocalTimezone"
+      v-if="differentFromUserTimezone"
+    >
+      {{ singleTimeZone }}
+    </b-switch>
+  </p>
+  <p v-else-if="endsOn">
     {{
       $t("From the {startDate} to the {endDate}", {
         startDate: formatDate(beginsOn),
         endDate: formatDate(endsOn),
       })
     }}
-  </span>
+  </p>
 </template>
 <script lang="ts">
 import { Component, Prop, Vue } from "vue-property-decorator";
@@ -90,14 +123,47 @@ export default class EventFullDate extends Vue {
 
   @Prop({ required: false, default: true }) showEndTime!: boolean;
 
+  @Prop({ required: false }) timezone!: string;
+
+  @Prop({ required: false }) userTimezone!: string;
+
+  showLocalTimezone = true;
+
+  get timezoneToShow(): string {
+    if (this.showLocalTimezone) {
+      return this.timezone;
+    }
+    return this.userActualTimezone;
+  }
+
+  get userActualTimezone(): string {
+    if (this.userTimezone) {
+      return this.userTimezone;
+    }
+    return Intl.DateTimeFormat().resolvedOptions().timeZone;
+  }
+
   formatDate(value: Date): string | undefined {
     if (!this.$options.filters) return undefined;
     return this.$options.filters.formatDateString(value);
   }
 
-  formatTime(value: Date): string | undefined {
+  formatTime(value: Date, timezone: string): string | undefined {
     if (!this.$options.filters) return undefined;
-    return this.$options.filters.formatTimeString(value);
+    return this.$options.filters.formatTimeString(value, timezone || undefined);
+  }
+
+  formatDateTimeString(
+    value: Date,
+    timezone: string,
+    showTime: boolean
+  ): string | undefined {
+    if (!this.$options.filters) return undefined;
+    return this.$options.filters.formatDateTimeString(
+      value,
+      timezone,
+      showTime
+    );
   }
 
   isSameDay(): boolean {
@@ -106,5 +172,35 @@ export default class EventFullDate extends Vue {
       new Date(this.endsOn).toDateString();
     return this.endsOn !== undefined && sameDay;
   }
+
+  get differentFromUserTimezone(): boolean {
+    return (
+      !!this.timezone &&
+      !!this.userActualTimezone &&
+      this.timezone !== this.userActualTimezone
+    );
+  }
+
+  get singleTimeZone(): string {
+    if (this.showLocalTimezone) {
+      return this.$t("Local time ({timezone})", {
+        timezone: this.timezoneToShow,
+      }) as string;
+    }
+    return this.$t("Time in your timezone ({timezone})", {
+      timezone: this.timezoneToShow,
+    }) as string;
+  }
+
+  get multipleTimeZones(): string {
+    if (this.showLocalTimezone) {
+      return this.$t("Local time ({timezone})", {
+        timezone: this.timezoneToShow,
+      }) as string;
+    }
+    return this.$t("Times in your timezone ({timezone})", {
+      timezone: this.timezoneToShow,
+    }) as string;
+  }
 }
 </script>
diff --git a/js/src/components/Event/EventMap.vue b/js/src/components/Event/EventMap.vue
new file mode 100644
index 00000000..7ed79b3f
--- /dev/null
+++ b/js/src/components/Event/EventMap.vue
@@ -0,0 +1,175 @@
+<template>
+  <div class="modal-card">
+    <header class="modal-card-head">
+      <button type="button" class="delete" @click="$emit('close')" />
+    </header>
+    <div class="modal-card-body">
+      <section class="map">
+        <map-leaflet
+          :coords="physicalAddress.geom"
+          :marker="{
+            text: physicalAddress.fullName,
+            icon: physicalAddress.poiInfos.poiIcon.icon,
+          }"
+        />
+      </section>
+      <section class="columns is-centered map-footer">
+        <div class="column is-half has-text-centered">
+          <p class="address">
+            <i class="mdi mdi-map-marker"></i>
+            {{ physicalAddress.fullName }}
+          </p>
+          <p class="getting-there">{{ $t("Getting there") }}</p>
+          <div
+            class="buttons"
+            v-if="
+              addressLinkToRouteByCar ||
+              addressLinkToRouteByBike ||
+              addressLinkToRouteByFeet
+            "
+          >
+            <a
+              class="button"
+              target="_blank"
+              v-if="addressLinkToRouteByFeet"
+              :href="addressLinkToRouteByFeet"
+            >
+              <i class="mdi mdi-walk"></i
+            ></a>
+            <a
+              class="button"
+              target="_blank"
+              v-if="addressLinkToRouteByBike"
+              :href="addressLinkToRouteByBike"
+            >
+              <i class="mdi mdi-bike"></i
+            ></a>
+            <a
+              class="button"
+              target="_blank"
+              v-if="addressLinkToRouteByTransit"
+              :href="addressLinkToRouteByTransit"
+            >
+              <i class="mdi mdi-bus"></i
+            ></a>
+            <a
+              class="button"
+              target="_blank"
+              v-if="addressLinkToRouteByCar"
+              :href="addressLinkToRouteByCar"
+            >
+              <i class="mdi mdi-car"></i>
+            </a>
+          </div>
+        </div>
+      </section>
+    </div>
+  </div>
+</template>
+<script lang="ts">
+import { Address, IAddress } from "@/types/address.model";
+import { RoutingTransportationType, RoutingType } from "@/types/enums";
+import { PropType } from "vue";
+import { Component, Vue, Prop } from "vue-property-decorator";
+
+const RoutingParamType = {
+  [RoutingType.OPENSTREETMAP]: {
+    [RoutingTransportationType.FOOT]: "engine=fossgis_osrm_foot",
+    [RoutingTransportationType.BIKE]: "engine=fossgis_osrm_bike",
+    [RoutingTransportationType.TRANSIT]: null,
+    [RoutingTransportationType.CAR]: "engine=fossgis_osrm_car",
+  },
+  [RoutingType.GOOGLE_MAPS]: {
+    [RoutingTransportationType.FOOT]: "dirflg=w",
+    [RoutingTransportationType.BIKE]: "dirflg=b",
+    [RoutingTransportationType.TRANSIT]: "dirflg=r",
+    [RoutingTransportationType.CAR]: "driving",
+  },
+};
+
+@Component({
+  components: {
+    "map-leaflet": () =>
+      import(/* webpackChunkName: "map" */ "../../components/Map.vue"),
+  },
+})
+export default class EventMap extends Vue {
+  @Prop({ type: Object as PropType<IAddress> }) address!: IAddress;
+  @Prop({ type: String }) routingType!: RoutingType;
+
+  get physicalAddress(): Address | null {
+    if (!this.address) return null;
+
+    return new Address(this.address);
+  }
+
+  makeNavigationPath(
+    transportationType: RoutingTransportationType
+  ): string | undefined {
+    const geometry = this.physicalAddress?.geom;
+    if (geometry) {
+      /**
+       * build urls to routing map
+       */
+      if (!RoutingParamType[this.routingType][transportationType]) {
+        return;
+      }
+
+      const urlGeometry = geometry.split(";").reverse().join(",");
+
+      switch (this.routingType) {
+        case RoutingType.GOOGLE_MAPS:
+          return `https://maps.google.com/?saddr=Current+Location&daddr=${urlGeometry}&${
+            RoutingParamType[this.routingType][transportationType]
+          }`;
+        case RoutingType.OPENSTREETMAP:
+        default: {
+          const bboxX = geometry.split(";").reverse()[0];
+          const bboxY = geometry.split(";").reverse()[1];
+          return `https://www.openstreetmap.org/directions?from=&to=${urlGeometry}&${
+            RoutingParamType[this.routingType][transportationType]
+          }#map=14/${bboxX}/${bboxY}`;
+        }
+      }
+    }
+  }
+
+  get addressLinkToRouteByCar(): undefined | string {
+    return this.makeNavigationPath(RoutingTransportationType.CAR);
+  }
+
+  get addressLinkToRouteByBike(): undefined | string {
+    return this.makeNavigationPath(RoutingTransportationType.BIKE);
+  }
+
+  get addressLinkToRouteByFeet(): undefined | string {
+    return this.makeNavigationPath(RoutingTransportationType.FOOT);
+  }
+
+  get addressLinkToRouteByTransit(): undefined | string {
+    return this.makeNavigationPath(RoutingTransportationType.TRANSIT);
+  }
+}
+</script>
+<style lang="scss" scoped>
+.modal-card-head {
+  justify-content: flex-end;
+  button.delete {
+    margin-right: 1rem;
+  }
+}
+
+section.map {
+  height: calc(100% - 8rem);
+  width: calc(100% - 20px);
+}
+
+section.map-footer {
+  p.address {
+    margin: 1rem auto;
+  }
+  div.buttons {
+    justify-content: center;
+  }
+}
+</style>
diff --git a/js/src/components/Event/EventMetadataSidebar.vue b/js/src/components/Event/EventMetadataSidebar.vue
index 912038d6..1f94d5d0 100644
--- a/js/src/components/Event/EventMetadataSidebar.vue
+++ b/js/src/components/Event/EventMetadataSidebar.vue
@@ -11,7 +11,7 @@
           <b-button
             type="is-text"
             class="map-show-button"
-            @click="showMap = !showMap"
+            @click="$emit('showMapModal', true)"
             v-if="physicalAddress.geom"
           >
             {{ $t("Show map") }}
@@ -24,6 +24,8 @@
         :beginsOn="event.beginsOn"
         :show-start-time="event.options.showStartTime"
         :show-end-time="event.options.showEndTime"
+        :timezone="event.options.timezone"
+        :userTimezone="userTimezone"
         :endsOn="event.endsOn"
       />
     </event-metadata-block>
@@ -130,91 +132,12 @@
       >
       <span v-else>{{ extra.value }}</span>
     </event-metadata-block>
-    <b-modal
-      class="map-modal"
-      v-if="physicalAddress && physicalAddress.geom"
-      :active.sync="showMap"
-      has-modal-card
-      full-screen
-    >
-      <div class="modal-card">
-        <header class="modal-card-head">
-          <button type="button" class="delete" @click="showMap = false" />
-        </header>
-        <div class="modal-card-body">
-          <section class="map">
-            <map-leaflet
-              :coords="physicalAddress.geom"
-              :marker="{
-                text: physicalAddress.fullName,
-                icon: physicalAddress.poiInfos.poiIcon.icon,
-              }"
-            />
-          </section>
-          <section class="columns is-centered map-footer">
-            <div class="column is-half has-text-centered">
-              <p class="address">
-                <i class="mdi mdi-map-marker"></i>
-                {{ physicalAddress.fullName }}
-              </p>
-              <p class="getting-there">{{ $t("Getting there") }}</p>
-              <div
-                class="buttons"
-                v-if="
-                  addressLinkToRouteByCar ||
-                  addressLinkToRouteByBike ||
-                  addressLinkToRouteByFeet
-                "
-              >
-                <a
-                  class="button"
-                  target="_blank"
-                  v-if="addressLinkToRouteByFeet"
-                  :href="addressLinkToRouteByFeet"
-                >
-                  <i class="mdi mdi-walk"></i
-                ></a>
-                <a
-                  class="button"
-                  target="_blank"
-                  v-if="addressLinkToRouteByBike"
-                  :href="addressLinkToRouteByBike"
-                >
-                  <i class="mdi mdi-bike"></i
-                ></a>
-                <a
-                  class="button"
-                  target="_blank"
-                  v-if="addressLinkToRouteByTransit"
-                  :href="addressLinkToRouteByTransit"
-                >
-                  <i class="mdi mdi-bus"></i
-                ></a>
-                <a
-                  class="button"
-                  target="_blank"
-                  v-if="addressLinkToRouteByCar"
-                  :href="addressLinkToRouteByCar"
-                >
-                  <i class="mdi mdi-car"></i>
-                </a>
-              </div>
-            </div>
-          </section>
-        </div>
-      </div>
-    </b-modal>
   </div>
 </template>
 <script lang="ts">
 import { Address } from "@/types/address.model";
 import { IConfig } from "@/types/config.model";
-import {
-  EventMetadataKeyType,
-  EventMetadataType,
-  RoutingTransportationType,
-  RoutingType,
-} from "@/types/enums";
+import { EventMetadataKeyType, EventMetadataType } from "@/types/enums";
 import { IEvent } from "@/types/event.model";
 import { PropType } from "vue";
 import { Component, Prop, Vue } from "vue-property-decorator";
@@ -224,11 +147,13 @@ import EventMetadataBlock from "./EventMetadataBlock.vue";
 import EventFullDate from "./EventFullDate.vue";
 import PopoverActorCard from "../Account/PopoverActorCard.vue";
 import ActorCard from "../../components/Account/ActorCard.vue";
+import AddressInfo from "../../components/Address/AddressInfo.vue";
 import {
   IEventMetadata,
   IEventMetadataDescription,
 } from "@/types/event-metadata";
 import { eventMetaDataList } from "../../services/EventMetadata";
+import { IUser } from "@/types/current-user.model";
 
 @Component({
   components: {
@@ -236,15 +161,14 @@ import { eventMetaDataList } from "../../services/EventMetadata";
     EventFullDate,
     PopoverActorCard,
     ActorCard,
-    "map-leaflet": () =>
-      import(/* webpackChunkName: "map" */ "../../components/Map.vue"),
+    AddressInfo,
   },
 })
 export default class EventMetadataSidebar extends Vue {
   @Prop({ type: Object as PropType<IEvent>, required: true }) event!: IEvent;
   @Prop({ type: Object as PropType<IConfig>, required: true }) config!: IConfig;
-
-  showMap = false;
+  @Prop({ required: true }) user!: IUser | undefined;
+  @Prop({ required: false, default: false }) showMap!: boolean;
 
   RouteName = RouteName;
 
@@ -255,21 +179,6 @@ export default class EventMetadataSidebar extends Vue {
   EventMetadataType = EventMetadataType;
   EventMetadataKeyType = EventMetadataKeyType;
 
-  RoutingParamType = {
-    [RoutingType.OPENSTREETMAP]: {
-      [RoutingTransportationType.FOOT]: "engine=fossgis_osrm_foot",
-      [RoutingTransportationType.BIKE]: "engine=fossgis_osrm_bike",
-      [RoutingTransportationType.TRANSIT]: null,
-      [RoutingTransportationType.CAR]: "engine=fossgis_osrm_car",
-    },
-    [RoutingType.GOOGLE_MAPS]: {
-      [RoutingTransportationType.FOOT]: "dirflg=w",
-      [RoutingTransportationType.BIKE]: "dirflg=b",
-      [RoutingTransportationType.TRANSIT]: "dirflg=r",
-      [RoutingTransportationType.CAR]: "driving",
-    },
-  };
-
   get physicalAddress(): Address | null {
     if (!this.event.physicalAddress) return null;
 
@@ -286,50 +195,6 @@ export default class EventMetadataSidebar extends Vue {
     });
   }
 
-  makeNavigationPath(
-    transportationType: RoutingTransportationType
-  ): string | undefined {
-    const geometry = this.physicalAddress?.geom;
-    if (geometry) {
-      const routingType = this.config.maps.routing.type;
-      /**
-       * build urls to routing map
-       */
-      if (!this.RoutingParamType[routingType][transportationType]) {
-        return;
-      }
-
-      const urlGeometry = geometry.split(";").reverse().join(",");
-
-      switch (routingType) {
-        case RoutingType.GOOGLE_MAPS:
-          return `https://maps.google.com/?saddr=Current+Location&daddr=${urlGeometry}&${this.RoutingParamType[routingType][transportationType]}`;
-        case RoutingType.OPENSTREETMAP:
-        default: {
-          const bboxX = geometry.split(";").reverse()[0];
-          const bboxY = geometry.split(";").reverse()[1];
-          return `https://www.openstreetmap.org/directions?from=&to=${urlGeometry}&${this.RoutingParamType[routingType][transportationType]}#map=14/${bboxX}/${bboxY}`;
-        }
-      }
-    }
-  }
-
-  get addressLinkToRouteByCar(): undefined | string {
-    return this.makeNavigationPath(RoutingTransportationType.CAR);
-  }
-
-  get addressLinkToRouteByBike(): undefined | string {
-    return this.makeNavigationPath(RoutingTransportationType.BIKE);
-  }
-
-  get addressLinkToRouteByFeet(): undefined | string {
-    return this.makeNavigationPath(RoutingTransportationType.FOOT);
-  }
-
-  get addressLinkToRouteByTransit(): undefined | string {
-    return this.makeNavigationPath(RoutingTransportationType.TRANSIT);
-  }
-
   urlToHostname(url: string): string | null {
     try {
       return new URL(url).hostname;
@@ -362,6 +227,10 @@ export default class EventMetadataSidebar extends Vue {
       }
     }
   }
+
+  get userTimezone(): string | undefined {
+    return this.user?.settings?.timezone;
+  }
 }
 </script>
 <style lang="scss" scoped>
@@ -391,50 +260,6 @@ div.address-wrapper {
     .map-show-button {
       cursor: pointer;
     }
-
-    address {
-      font-style: normal;
-      flex-wrap: wrap;
-      display: flex;
-      justify-content: flex-start;
-
-      span.addressDescription {
-        text-overflow: ellipsis;
-        white-space: nowrap;
-        flex: 1 0 auto;
-        min-width: 100%;
-        max-width: 4rem;
-        overflow: hidden;
-      }
-
-      :not(.addressDescription) {
-        flex: 1;
-        min-width: 100%;
-      }
-    }
-  }
-}
-
-.map-modal {
-  .modal-card-head {
-    justify-content: flex-end;
-    button.delete {
-      margin-right: 1rem;
-    }
-  }
-
-  section.map {
-    height: calc(100% - 8rem);
-    width: calc(100% - 20px);
-  }
-
-  section.map-footer {
-    p.address {
-      margin: 1rem auto;
-    }
-    div.buttons {
-      justify-content: center;
-    }
   }
 }
 </style>
diff --git a/js/src/components/Event/FullAddressAutoComplete.vue b/js/src/components/Event/FullAddressAutoComplete.vue
index b1af7d7a..48f16ead 100644
--- a/js/src/components/Event/FullAddressAutoComplete.vue
+++ b/js/src/components/Event/FullAddressAutoComplete.vue
@@ -1,72 +1,89 @@
 <template>
-  <div class="address-autocomplete">
-    <b-field
-      :label-for="id"
-      expanded
-      :message="fieldErrors"
-      :type="{ 'is-danger': fieldErrors.length }"
-    >
-      <template slot="label">
-        {{ actualLabel }}
-        <b-button
-          v-if="canShowLocateMeButton && !gettingLocation"
-          size="is-small"
-          icon-right="map-marker"
-          @click="locateMe"
-          :title="$t('Use my location')"
-        />
-        <span
-          class="is-size-6 has-text-weight-normal"
-          v-else-if="gettingLocation"
-          >{{ $t("Getting location") }}</span
-        >
-      </template>
-      <b-autocomplete
-        :data="addressData"
-        v-model="queryText"
-        :placeholder="$t('e.g. 10 Rue Jangot')"
-        field="fullName"
-        :loading="isFetching"
-        @typing="fetchAsyncData"
-        icon="map-marker"
+  <div class="address-autocomplete columns is-desktop">
+    <div class="column">
+      <b-field
+        :label-for="id"
         expanded
-        @select="updateSelected"
-        v-bind="$attrs"
-        :id="id"
+        :message="fieldErrors"
+        :type="{ 'is-danger': fieldErrors.length }"
       >
-        <template #default="{ option }">
-          <b-icon :icon="option.poiInfos.poiIcon.icon" />
-          <b>{{ option.poiInfos.name }}</b
-          ><br />
-          <small>{{ option.poiInfos.alternativeName }}</small>
+        <template slot="label">
+          {{ actualLabel }}
+          <b-button
+            v-if="canShowLocateMeButton && !gettingLocation"
+            size="is-small"
+            icon-right="map-marker"
+            @click="locateMe"
+            :title="$t('Use my location')"
+          />
+          <span
+            class="is-size-6 has-text-weight-normal"
+            v-else-if="gettingLocation"
+            >{{ $t("Getting location") }}</span
+          >
         </template>
-        <template slot="empty">
-          <span v-if="isFetching">{{ $t("Searching…") }}</span>
-          <div v-else-if="queryText.length >= 3" class="is-enabled">
-            <span>{{ $t('No results for "{queryText}"', { queryText }) }}</span>
-            <span>{{
-              $t(
-                "You can try another search term or drag and drop the marker on the map",
-                {
-                  queryText,
-                }
-              )
-            }}</span>
-            <!--                        <p class="control" @click="openNewAddressModal">-->
-            <!--                            <button type="button" class="button is-primary">{{ $t('Add') }}</button>-->
-            <!--                        </p>-->
-          </div>
-        </template>
-      </b-autocomplete>
-      <b-button
-        :disabled="!queryText"
-        @click="resetAddress"
-        class="reset-area"
-        icon-left="close"
-        :title="$t('Clear address field')"
-      />
-    </b-field>
-    <div class="map" v-if="selected && selected.geom && selected.poiInfos">
+        <b-autocomplete
+          :data="addressData"
+          v-model="queryText"
+          :placeholder="$t('e.g. 10 Rue Jangot')"
+          field="fullName"
+          :loading="isFetching"
+          @typing="fetchAsyncData"
+          icon="map-marker"
+          expanded
+          @select="updateSelected"
+          v-bind="$attrs"
+          :id="id"
+        >
+          <template #default="{ option }">
+            <b-icon :icon="option.poiInfos.poiIcon.icon" />
+            <b>{{ option.poiInfos.name }}</b
+            ><br />
+            <small>{{ option.poiInfos.alternativeName }}</small>
+          </template>
+          <template slot="empty">
+            <span v-if="isFetching">{{ $t("Searching…") }}</span>
+            <div v-else-if="queryText.length >= 3" class="is-enabled">
+              <span>{{
+                $t('No results for "{queryText}"', { queryText })
+              }}</span>
+              <span>{{
+                $t(
+                  "You can try another search term or drag and drop the marker on the map",
+                  {
+                    queryText,
+                  }
+                )
+              }}</span>
+              <!--                        <p class="control" @click="openNewAddressModal">-->
+              <!--                            <button type="button" class="button is-primary">{{ $t('Add') }}</button>-->
+              <!--                        </p>-->
+            </div>
+          </template>
+        </b-autocomplete>
+        <b-button
+          :disabled="!queryText"
+          @click="resetAddress"
+          class="reset-area"
+          icon-left="close"
+          :title="$t('Clear address field')"
+        />
+      </b-field>
+      <div class="card" v-if="selected.originId || selected.url">
+        <div class="card-content">
+          <address-info
+            :address="selected"
+            :show-icon="true"
+            :show-timezone="true"
+            :user-timezone="userTimezone"
+          />
+        </div>
+      </div>
+    </div>
+    <div
+      class="map column"
+      v-if="selected && selected.geom && selected.poiInfos"
+    >
       <map-leaflet
         :coords="selected.geom"
         :marker="{
@@ -126,14 +143,19 @@ import { Component, Prop, Watch, Mixins } from "vue-property-decorator";
 import { LatLng } from "leaflet";
 import { Address, IAddress } from "../../types/address.model";
 import AddressAutoCompleteMixin from "../../mixins/AddressAutoCompleteMixin";
+import AddressInfo from "../../components/Address/AddressInfo.vue";
 
 @Component({
   inheritAttrs: false,
+  components: {
+    AddressInfo,
+  },
 })
 export default class FullAddressAutoComplete extends Mixins(
   AddressAutoCompleteMixin
 ) {
   @Prop({ required: false, default: "" }) label!: string;
+  @Prop({ required: false }) userTimezone!: string;
 
   addressModalActive = false;
 
diff --git a/js/src/components/NavBar.vue b/js/src/components/NavBar.vue
index 29aab31e..b23f93d1 100644
--- a/js/src/components/NavBar.vue
+++ b/js/src/components/NavBar.vue
@@ -187,7 +187,7 @@
 </template>
 
 <script lang="ts">
-import { Component, Vue, Watch } from "vue-property-decorator";
+import { Component, Ref, Vue, Watch } from "vue-property-decorator";
 import Logo from "@/components/Logo.vue";
 import { GraphQLError } from "graphql";
 import { loadLanguageAsync } from "@/utils/i18n";
@@ -259,6 +259,13 @@ export default class NavBar extends Vue {
 
   displayName = displayName;
 
+  @Ref("user-dropdown") userDropDown!: any;
+
+  toggleMenu(): void {
+    console.debug("called toggleMenu");
+    this.userDropDown.showMenu();
+  }
+
   @Watch("currentActor")
   async initializeListOfIdentities(): Promise<void> {
     if (!this.currentUser.isLoggedIn) return;
diff --git a/js/src/filters/datetime.ts b/js/src/filters/datetime.ts
index 4211375f..e5fdb272 100644
--- a/js/src/filters/datetime.ts
+++ b/js/src/filters/datetime.ts
@@ -14,10 +14,11 @@ function formatDateString(value: string): string {
   });
 }
 
-function formatTimeString(value: string): string {
+function formatTimeString(value: string, timeZone: string): string {
   return parseDateTime(value).toLocaleTimeString(locale(), {
     hour: "numeric",
     minute: "numeric",
+    timeZone,
   });
 }
 
@@ -55,6 +56,7 @@ const SHORT_TIME_FORMAT_OPTIONS: DateTimeFormatOptions = {
 
 function formatDateTimeString(
   value: string,
+  timeZone: string | undefined = undefined,
   showTime = true,
   dateFormat = "long"
 ): string {
@@ -66,6 +68,7 @@ function formatDateTimeString(
     options = {
       ...options,
       ...(isLongFormat ? LONG_TIME_FORMAT_OPTIONS : SHORT_TIME_FORMAT_OPTIONS),
+      timeZone,
     };
   }
   const format = new Intl.DateTimeFormat(locale(), options);
diff --git a/js/src/graphql/address.ts b/js/src/graphql/address.ts
index 4aefe98f..163621e1 100644
--- a/js/src/graphql/address.ts
+++ b/js/src/graphql/address.ts
@@ -13,6 +13,7 @@ export const ADDRESS_FRAGMENT = gql`
     type
     url
     originId
+    timezone
   }
 `;
 
diff --git a/js/src/graphql/config.ts b/js/src/graphql/config.ts
index a7b34569..0fb5fa2c 100644
--- a/js/src/graphql/config.ts
+++ b/js/src/graphql/config.ts
@@ -96,6 +96,31 @@ export const CONFIG = gql`
   }
 `;
 
+export const CONFIG_EDIT_EVENT = gql`
+  query EditEventConfig {
+    config {
+      timezones
+      features {
+        groups
+      }
+      anonymous {
+        participation {
+          allowed
+          validation {
+            email {
+              enabled
+              confirmationRequired
+            }
+            captcha {
+              enabled
+            }
+          }
+        }
+      }
+    }
+  }
+`;
+
 export const TERMS = gql`
   query Terms($locale: String) {
     config {
diff --git a/js/src/graphql/event.ts b/js/src/graphql/event.ts
index 0e6ebcb7..4e9a8bab 100644
--- a/js/src/graphql/event.ts
+++ b/js/src/graphql/event.ts
@@ -46,6 +46,7 @@ const EVENT_OPTIONS_FRAGMENT = gql`
     anonymousParticipation
     showStartTime
     showEndTime
+    timezone
     offers {
       price
       priceCurrency
diff --git a/js/src/graphql/user.ts b/js/src/graphql/user.ts
index ad7ba463..0f0e7e37 100644
--- a/js/src/graphql/user.ts
+++ b/js/src/graphql/user.ts
@@ -147,6 +147,17 @@ export const USER_SETTINGS = gql`
   ${USER_SETTINGS_FRAGMENT}
 `;
 
+export const LOGGED_USER_TIMEZONE = gql`
+  query LoggedUserTimezone {
+    loggedUser {
+      id
+      settings {
+        timezone
+      }
+    }
+  }
+`;
+
 export const SET_USER_SETTINGS = gql`
   mutation SetUserSettings(
     $timezone: String
diff --git a/js/src/i18n/en_US.json b/js/src/i18n/en_US.json
index a5cc6f66..0c784307 100644
--- a/js/src/i18n/en_US.json
+++ b/js/src/i18n/en_US.json
@@ -1158,5 +1158,47 @@
   "Who can post a comment?": "Who can post a comment?",
   "Does the event needs to be confirmed later or is it cancelled?": "Does the event needs to be confirmed later or is it cancelled?",
   "When the post is private, you'll need to share the link around.": "When the post is private, you'll need to share the link around.",
-  "Reset": "Reset"
-}
+  "Reset": "Reset",
+  "Local time ({timezone})": "Local time ({timezone})",
+  "Time in your timezone ({timezone})": "Time in your timezone ({timezone})",
+  "Export": "Export",
+  "Times in your timezone ({timezone})": "Times in your timezone ({timezone})",
+  "Skip to main": "Skip to main",
+  "Comment body": "Comment body",
+  "has loaded": "has loaded",
+  "Follows": "Follows",
+  "Event description body": "Event description body",
+  "Event timezone will default to the timezone of the event's address if there is one, or to your own timezone setting.": "Event timezone will default to the timezone of the event's address if there is one, or to your own timezone setting.",
+  "Clear timezone field": "Clear timezone field",
+  "Group description body": "Group description body",
+  "Moderation logs": "Moderation logs",
+  "Post body": "Post body",
+  "{group} posts": "{group} posts",
+  "{group}'s todolists": "{group}'s todolists",
+  "Validating email": "Validating email",
+  "Redirecting to Mobilizon": "Redirecting to Mobilizon",
+  "Reset password": "Reset password",
+  "First steps": "First steps",
+  "Validating account": "Validating account",
+  "Navigated to {pageTitle}": "Navigated to {pageTitle}",
+  "Confirm participation": "Confirm participation",
+  "Participation with account": "Participation with account",
+  "Participation without account": "Participation without account",
+  "Unlogged participation": "Unlogged participation",
+  "Discussions list": "Discussions list",
+  "Create discussion": "Create discussion",
+  "Tag search": "Tag search",
+  "Homepage": "Homepage",
+  "About instance": "About instance",
+  "Privacy": "Privacy",
+  "Interact": "Interact",
+  "Account settings": "Account settings",
+  "Admin dashboard": "Admin dashboard",
+  "Admin settings": "Admin settings",
+  "Group profiles": "Group profiles",
+  "Reports list": "Reports list",
+  "Create identity": "Create identity",
+  "Resent confirmation email": "Resent confirmation email",
+  "Send password reset": "Send password reset",
+  "Email validate": "Email validate"
+}
\ No newline at end of file
diff --git a/js/src/i18n/fr_FR.json b/js/src/i18n/fr_FR.json
index d50acb09..ae8c35f2 100644
--- a/js/src/i18n/fr_FR.json
+++ b/js/src/i18n/fr_FR.json
@@ -1262,5 +1262,47 @@
   "{profile} updated the member {member}.": "{profile} a mis à jour le ou la membre {member}.",
   "{title} ({count} todos)": "{title} ({count} todos)",
   "{username} was invited to {group}": "{username} a été invité à {group}",
-  "© The OpenStreetMap Contributors": "© Les Contributeur⋅ices OpenStreetMap"
-}
+  "© The OpenStreetMap Contributors": "© Les Contributeur⋅ices OpenStreetMap",
+  "Local time ({timezone})": "Heure locale ({timezone})",
+  "Time in your timezone ({timezone})": "Heure dans votre fuseau horaire ({timezone})",
+  "Export": "Export",
+  "Times in your timezone ({timezone})": "Heures dans votre fuseau horaire ({timezone})",
+  "has loaded": "a chargé",
+  "Skip to main": "",
+  "Navigated to {pageTitle}": "Navigué vers {pageTitle}",
+  "Comment body": "Corps du commentaire",
+  "Confirm participation": "Confirmer la participation",
+  "Participation with account": "Participation avec compte",
+  "Participation without account": "Participation sans compte",
+  "Unlogged participation": "Participation non connecté⋅e",
+  "Discussions list": "Liste des discussions",
+  "Create discussion": "Créer une discussion",
+  "Tag search": "Recherche par tag",
+  "Homepage": "Page d'accueil",
+  "About instance": "À propos de l'instance",
+  "Privacy": "Vie privée",
+  "Interact": "Interagir",
+  "Redirecting to Mobilizon": "Redirection vers Mobilizon",
+  "First steps": "",
+  "Account settings": "",
+  "Admin dashboard": "",
+  "Admin settings": "",
+  "Group profiles": "",
+  "Reports list": "",
+  "Moderation logs": "",
+  "Create identity": "",
+  "Resent confirmation email": "",
+  "Send password reset": "",
+  "Email validate": "",
+  "Validating account": "",
+  "Follows": "",
+  "Event description body": "",
+  "Event timezone will default to the timezone of the event's address if there is one, or to your own timezone setting.": "Le fuseau horaire de l'événement sera mis par défaut au fuseau horaire de l'addresse de l'événement s'il y en a une, ou bien à votre propre paramètre de fuseau horaire.",
+  "Clear timezone field": "",
+  "Group description body": "",
+  "Post body": "Corps du billet",
+  "{group} posts": "Billets de {group}",
+  "{group}'s todolists": "Liste de tâches de {group}",
+  "Validating email": "",
+  "Reset password": ""
+}
\ No newline at end of file
diff --git a/js/src/types/address.model.ts b/js/src/types/address.model.ts
index c1cee473..bfac5696 100644
--- a/js/src/types/address.model.ts
+++ b/js/src/types/address.model.ts
@@ -13,6 +13,7 @@ export interface IAddress {
   geom?: string;
   url?: string;
   originId?: string;
+  timezone?: string;
 }
 
 export interface IPoiInfo {
@@ -44,20 +45,23 @@ export class Address implements IAddress {
 
   geom?: string = "";
 
+  timezone?: string = "";
+
   constructor(hash?: IAddress) {
     if (!hash) return;
 
     this.id = hash.id;
-    this.description = hash.description;
-    this.street = hash.street;
-    this.locality = hash.locality;
-    this.postalCode = hash.postalCode;
-    this.region = hash.region;
-    this.country = hash.country;
+    this.description = hash.description?.trim();
+    this.street = hash.street?.trim();
+    this.locality = hash.locality?.trim();
+    this.postalCode = hash.postalCode?.trim();
+    this.region = hash.region?.trim();
+    this.country = hash.country?.trim();
     this.type = hash.type;
     this.geom = hash.geom;
     this.url = hash.url;
     this.originId = hash.originId;
+    this.timezone = hash.timezone;
   }
 
   get poiInfos(): IPoiInfo {
diff --git a/js/src/types/event-options.model.ts b/js/src/types/event-options.model.ts
index f045d7f5..d33ab945 100644
--- a/js/src/types/event-options.model.ts
+++ b/js/src/types/event-options.model.ts
@@ -26,6 +26,7 @@ export interface IEventOptions {
   showParticipationPrice: boolean;
   showStartTime: boolean;
   showEndTime: boolean;
+  timezone: string | null;
 }
 
 export class EventOptions implements IEventOptions {
@@ -54,4 +55,6 @@ export class EventOptions implements IEventOptions {
   showStartTime = true;
 
   showEndTime = true;
+
+  timezone = null;
 }
diff --git a/js/src/types/event.model.ts b/js/src/types/event.model.ts
index 7842b7be..4574e2d3 100644
--- a/js/src/types/event.model.ts
+++ b/js/src/types/event.model.ts
@@ -35,7 +35,7 @@ interface IEventEditJSON {
   id?: string;
   title: string;
   description: string;
-  beginsOn: string;
+  beginsOn: string | null;
   endsOn: string | null;
   status: EventStatus;
   visibility: EventVisibility;
@@ -92,6 +92,9 @@ export interface IEvent {
   toEditJSON(): IEventEditJSON;
 }
 
+export interface IEditableEvent extends Omit<IEvent, "beginsOn"> {
+  beginsOn: Date | null;
+}
 export class EventModel implements IEvent {
   id?: string;
 
@@ -158,7 +161,7 @@ export class EventModel implements IEvent {
 
   metadata: IEventMetadata[] = [];
 
-  constructor(hash?: IEvent) {
+  constructor(hash?: IEvent | IEditableEvent) {
     if (!hash) return;
 
     this.id = hash.id;
@@ -170,8 +173,14 @@ export class EventModel implements IEvent {
     this.slug = hash.slug;
     this.description = hash.description || "";
 
-    this.beginsOn = new Date(hash.beginsOn);
-    if (hash.endsOn) this.endsOn = new Date(hash.endsOn);
+    if (hash.beginsOn) {
+      this.beginsOn = new Date(hash.beginsOn);
+    }
+    if (hash.endsOn) {
+      this.endsOn = new Date(hash.endsOn);
+    } else {
+      this.endsOn = null;
+    }
 
     this.publishAt = new Date(hash.publishAt);
 
@@ -217,12 +226,12 @@ export function removeTypeName(entity: any): any {
   return entity;
 }
 
-export function toEditJSON(event: IEvent): IEventEditJSON {
+export function toEditJSON(event: IEditableEvent): IEventEditJSON {
   return {
     id: event.id,
     title: event.title,
     description: event.description,
-    beginsOn: event.beginsOn.toISOString(),
+    beginsOn: event.beginsOn ? event.beginsOn.toISOString() : null,
     endsOn: event.endsOn ? event.endsOn.toISOString() : null,
     status: event.status,
     visibility: event.visibility,
diff --git a/js/src/views/Event/Edit.vue b/js/src/views/Event/Edit.vue
index 17646646..1b6b7804 100644
--- a/js/src/views/Event/Edit.vue
+++ b/js/src/views/Event/Edit.vue
@@ -44,9 +44,10 @@
             :placeholder="$t('Type or select a date…')"
             icon="calendar-today"
             :locale="$i18n.locale"
-            v-model="event.beginsOn"
+            v-model="beginsOn"
             horizontal-time-picker
             editable
+            :tz-offset="tzOffset(beginsOn)"
             :datepicker="{
               id: 'begins-on-field',
               'aria-next-label': $t('Next month'),
@@ -62,9 +63,10 @@
             :placeholder="$t('Type or select a date…')"
             icon="calendar-today"
             :locale="$i18n.locale"
-            v-model="event.endsOn"
+            v-model="endsOn"
             horizontal-time-picker
-            :min-datetime="event.beginsOn"
+            :min-datetime="beginsOn"
+            :tz-offset="tzOffset(endsOn)"
             editable
             :datepicker="{
               id: 'ends-on-field',
@@ -75,12 +77,14 @@
           </b-datetimepicker>
         </b-field>
 
-        <!--          <b-switch v-model="endsOnNull">{{ $t('No end date') }}</b-switch>-->
         <b-button type="is-text" @click="dateSettingsIsOpen = true">
           {{ $t("Date parameters") }}
         </b-button>
 
-        <full-address-auto-complete v-model="event.physicalAddress" />
+        <full-address-auto-complete
+          v-model="eventPhysicalAddress"
+          :user-timezone="userActualTimezone"
+        />
 
         <div class="field">
           <label class="label">{{ $t("Description") }}</label>
@@ -332,9 +336,45 @@
       <form action>
         <div class="modal-card" style="width: auto">
           <header class="modal-card-head">
-            <p class="modal-card-title">{{ $t("Date and time settings") }}</p>
+            <h3 class="modal-card-title">{{ $t("Date and time settings") }}</h3>
           </header>
           <section class="modal-card-body">
+            <p>
+              {{
+                $t(
+                  "Event timezone will default to the timezone of the event's address if there is one, or to your own timezone setting."
+                )
+              }}
+            </p>
+            <b-field :label="$t('Timezone')" label-for="timezone" expanded>
+              <b-select
+                :placeholder="$t('Select a timezone')"
+                :loading="!config"
+                v-model="timezone"
+                id="timezone"
+              >
+                <optgroup
+                  :label="group"
+                  v-for="(groupTimezones, group) in timezones"
+                  :key="group"
+                >
+                  <option
+                    v-for="timezone in groupTimezones"
+                    :value="`${group}/${timezone}`"
+                    :key="timezone"
+                  >
+                    {{ sanitizeTimezone(timezone) }}
+                  </option>
+                </optgroup>
+              </b-select>
+              <b-button
+                :disabled="!timezone"
+                @click="timezone = null"
+                class="reset-area"
+                icon-left="close"
+                :title="$t('Clear timezone field')"
+              />
+            </b-field>
             <b-field :label="$t('Event page settings')">
               <b-switch v-model="eventOptions.showStartTime">{{
                 $t("Show the time when the event begins")
@@ -514,6 +554,7 @@ section {
 
 <script lang="ts">
 import { Component, Prop, Vue, Watch } from "vue-property-decorator";
+import { getTimezoneOffset } from "date-fns-tz";
 import PictureUpload from "@/components/PictureUpload.vue";
 import EditorComponent from "@/components/Editor.vue";
 import TagInput from "@/components/Event/TagInput.vue";
@@ -541,6 +582,7 @@ import {
 } from "../../graphql/event";
 import {
   EventModel,
+  IEditableEvent,
   IEvent,
   removeTypeName,
   toEditJSON,
@@ -566,7 +608,7 @@ import {
 } from "../../utils/image";
 import RouteName from "../../router/name";
 import "intersection-observer";
-import { CONFIG } from "../../graphql/config";
+import { CONFIG_EDIT_EVENT } from "../../graphql/config";
 import { IConfig } from "../../types/config.model";
 import {
   ApolloCache,
@@ -575,6 +617,9 @@ import {
 } from "@apollo/client/core";
 import cloneDeep from "lodash/cloneDeep";
 import { IEventOptions } from "@/types/event-options.model";
+import { USER_SETTINGS } from "@/graphql/user";
+import { IUser } from "@/types/current-user.model";
+import { IAddress } from "@/types/address.model";
 
 const DEFAULT_LIMIT_NUMBER_OF_PLACES = 10;
 
@@ -591,7 +636,8 @@ const DEFAULT_LIMIT_NUMBER_OF_PLACES = 10;
   },
   apollo: {
     currentActor: CURRENT_ACTOR_CLIENT,
-    config: CONFIG,
+    loggedUser: USER_SETTINGS,
+    config: CONFIG_EDIT_EVENT,
     identities: IDENTITIES,
     event: {
       query: FETCH_EVENT,
@@ -643,9 +689,11 @@ export default class EditEvent extends Vue {
 
   currentActor!: IActor;
 
-  event: IEvent = new EventModel();
+  loggedUser!: IUser;
 
-  unmodifiedEvent: IEvent = new EventModel();
+  event: IEditableEvent = new EventModel();
+
+  unmodifiedEvent: IEditableEvent = new EventModel();
 
   identities: IActor[] = [];
 
@@ -671,8 +719,6 @@ export default class EditEvent extends Vue {
 
   dateSettingsIsOpen = false;
 
-  endsOnNull = false;
-
   saving = false;
 
   displayNameAndUsername = displayNameAndUsername;
@@ -908,7 +954,7 @@ export default class EditEvent extends Vue {
    */
   private postCreateOrUpdate(store: any, updateEvent: IEvent) {
     const resultEvent: IEvent = { ...updateEvent };
-    console.log(resultEvent);
+    console.debug("resultEvent", resultEvent);
     if (!updateEvent.draft) {
       store.writeQuery({
         query: EVENT_PERSON_PARTICIPATION,
@@ -984,6 +1030,23 @@ export default class EditEvent extends Vue {
       ...toEditJSON(new EventModel(this.event)),
       options: this.eventOptions,
     };
+
+    console.debug(this.event.beginsOn?.toISOString());
+
+    // if (this.event.beginsOn && this.timezone) {
+    //   console.debug(
+    //     "begins on should be",
+    //     zonedTimeToUtc(this.event.beginsOn, this.timezone).toISOString()
+    //   );
+    // }
+
+    // if (this.event.beginsOn && this.timezone) {
+    //   res.beginsOn = zonedTimeToUtc(
+    //     this.event.beginsOn,
+    //     this.timezone
+    //   ).toISOString();
+    // }
+
     const organizerActor = this.event.organizerActor?.id
       ? this.event.organizerActor
       : this.organizerActor;
@@ -995,10 +1058,6 @@ export default class EditEvent extends Vue {
       : null;
     res = { ...res, attributedToId };
 
-    if (this.endsOnNull) {
-      res.endsOn = null;
-    }
-
     if (this.pictureFile) {
       const pictureObj = buildFileVariable(this.pictureFile, "picture");
       res = { ...res, ...pictureObj };
@@ -1119,13 +1178,16 @@ export default class EditEvent extends Vue {
     );
   }
 
-  get beginsOn(): Date {
+  get beginsOn(): Date | null {
+    // if (this.timezone && this.event.beginsOn) {
+    //   return utcToZonedTime(this.event.beginsOn, this.timezone);
+    // }
     return this.event.beginsOn;
   }
 
-  @Watch("beginsOn", { deep: true })
-  onBeginsOnChanged(beginsOn: string): void {
-    if (!this.event.endsOn) return;
+  set beginsOn(beginsOn: Date | null) {
+    this.event.beginsOn = beginsOn;
+    if (!this.event.endsOn || !beginsOn) return;
     const dateBeginsOn = new Date(beginsOn);
     const dateEndsOn = new Date(this.event.endsOn);
     if (dateEndsOn < dateBeginsOn) {
@@ -1137,13 +1199,94 @@ export default class EditEvent extends Vue {
     }
   }
 
-  /**
-   * In event endsOn datepicker, we lock starting with the day before the beginsOn date
-   */
-  get minDateForEndsOn(): Date {
-    const minDate = new Date(this.event.beginsOn);
-    minDate.setDate(minDate.getDate() - 1);
-    return minDate;
+  get endsOn(): Date | null {
+    // if (this.event.endsOn && this.timezone) {
+    //   return utcToZonedTime(this.event.endsOn, this.timezone);
+    // }
+    return this.event.endsOn;
+  }
+
+  set endsOn(endsOn: Date | null) {
+    this.event.endsOn = endsOn;
+  }
+
+  get timezones(): Record<string, string[]> {
+    if (!this.config || !this.config.timezones) return {};
+    return this.config.timezones.reduce(
+      (acc: { [key: string]: Array<string> }, val: string) => {
+        const components = val.split("/");
+        const [prefix, suffix] = [
+          components.shift() as string,
+          components.join("/"),
+        ];
+        const pushOrCreate = (
+          acc2: { [key: string]: Array<string> },
+          prefix2: string,
+          suffix2: string
+        ) => {
+          // eslint-disable-next-line no-param-reassign
+          (acc2[prefix2] = acc2[prefix2] || []).push(suffix2);
+          return acc2;
+        };
+        if (suffix) {
+          return pushOrCreate(acc, prefix, suffix);
+        }
+        return pushOrCreate(acc, this.$t("Other") as string, prefix);
+      },
+      {}
+    );
+  }
+
+  // eslint-disable-next-line class-methods-use-this
+  sanitizeTimezone(timezone: string): string {
+    return timezone
+      .split("_")
+      .join(" ")
+      .replace("St ", "St. ")
+      .split("/")
+      .join(" - ");
+  }
+
+  get timezone(): string | null {
+    return this.event.options.timezone;
+  }
+
+  set timezone(timezone: string | null) {
+    this.event.options = {
+      ...this.event.options,
+      timezone,
+    };
+  }
+
+  get userTimezone(): string | undefined {
+    return this.loggedUser?.settings?.timezone;
+  }
+
+  get userActualTimezone(): string {
+    if (this.userTimezone) {
+      return this.userTimezone;
+    }
+    return Intl.DateTimeFormat().resolvedOptions().timeZone;
+  }
+
+  tzOffset(date: Date): number {
+    if (this.timezone && date) {
+      const eventUTCOffset = getTimezoneOffset(this.timezone, date);
+      const localUTCOffset = getTimezoneOffset(this.userActualTimezone);
+      return (eventUTCOffset - localUTCOffset) / (60 * 1000);
+    }
+    return 0;
+  }
+
+  get eventPhysicalAddress(): IAddress | null {
+    return this.event.physicalAddress;
+  }
+
+  set eventPhysicalAddress(address: IAddress | null) {
+    if (address && address.timezone) {
+      this.timezone = address.timezone;
+    }
+    this.event.physicalAddress = address;
   }
 }
 </script>
diff --git a/js/src/views/Event/Event.vue b/js/src/views/Event/Event.vue
index bcf387f9..b30adfeb 100755
--- a/js/src/views/Event/Event.vue
+++ b/js/src/views/Event/Event.vue
@@ -303,6 +303,8 @@
               v-if="event && config"
               :event="event"
               :config="config"
+              :user="loggedUser"
+              @showMapModal="showMap = true"
             />
           </div>
         </aside>
@@ -458,6 +460,22 @@
           </section>
         </div>
       </b-modal>
+      <b-modal
+        class="map-modal"
+        v-if="event.physicalAddress && event.physicalAddress.geom"
+        :active.sync="showMap"
+        has-modal-card
+        full-screen
+        :can-cancel="['escape', 'outside']"
+      >
+        <template #default="props">
+          <event-map
+            :routingType="routingType"
+            :address="event.physicalAddress"
+            @close="props.close"
+          />
+        </template>
+      </b-modal>
     </div>
   </div>
 </template>
@@ -508,11 +526,14 @@ import Subtitle from "../../components/Utils/Subtitle.vue";
 import Tag from "../../components/Tag.vue";
 import EventMetadataSidebar from "../../components/Event/EventMetadataSidebar.vue";
 import EventBanner from "../../components/Event/EventBanner.vue";
+import EventMap from "../../components/Event/EventMap.vue";
 import PopoverActorCard from "../../components/Account/PopoverActorCard.vue";
 import { IParticipant } from "../../types/participant.model";
 import { ApolloCache, FetchResult } from "@apollo/client/core";
 import { IEventMetadataDescription } from "@/types/event-metadata";
 import { eventMetaDataList } from "../../services/EventMetadata";
+import { USER_SETTINGS } from "@/graphql/user";
+import { IUser } from "@/types/current-user.model";
 
 // noinspection TypeScriptValidateTypes
 @Component({
@@ -529,6 +550,7 @@ import { eventMetaDataList } from "../../services/EventMetadata";
     PopoverActorCard,
     EventBanner,
     EventMetadataSidebar,
+    EventMap,
     ShareEventModal: () =>
       import(
         /* webpackChunkName: "shareEventModal" */ "../../components/Event/ShareEventModal.vue"
@@ -567,9 +589,8 @@ import { eventMetaDataList } from "../../services/EventMetadata";
         this.handleErrors(graphQLErrors);
       },
     },
-    currentActor: {
-      query: CURRENT_ACTOR_CLIENT,
-    },
+    currentActor: CURRENT_ACTOR_CLIENT,
+    loggedUser: USER_SETTINGS,
     participations: {
       query: EVENT_PERSON_PARTICIPATION,
       fetchPolicy: "cache-and-network",
@@ -646,6 +667,8 @@ export default class Event extends EventMixin {
 
   person!: IPerson;
 
+  loggedUser!: IUser;
+
   participations: IParticipant[] = [];
 
   oldParticipationRole!: string;
@@ -1130,6 +1153,12 @@ export default class Event extends EventMixin {
         return acc;
       }, {});
   }
+
+  showMap = false;
+
+  get routingType(): string | undefined {
+    return this.config?.maps?.routing?.type;
+  }
 }
 </script>
 <style lang="scss" scoped>
diff --git a/js/tests/unit/specs/components/Post/PostElementItem.spec.ts b/js/tests/unit/specs/components/Post/PostElementItem.spec.ts
index 1fb4cfa5..0ce89f5a 100644
--- a/js/tests/unit/specs/components/Post/PostElementItem.spec.ts
+++ b/js/tests/unit/specs/components/Post/PostElementItem.spec.ts
@@ -59,7 +59,7 @@ describe("PostElementItem", () => {
       postData.title
     );
     expect(wrapper.find(".metadata").text()).toContain(
-      formatDateTimeString(postData.insertedAt, false)
+      formatDateTimeString(postData.insertedAt, undefined, false)
     );
 
     expect(wrapper.find(".metadata small").text()).not.toContain("Public");
diff --git a/js/tsconfig.json b/js/tsconfig.json
index 5380762d..99369f90 100644
--- a/js/tsconfig.json
+++ b/js/tsconfig.json
@@ -18,7 +18,7 @@
     "paths": {
       "@/*": ["src/*"]
     },
-    "lib": ["esnext", "dom", "dom.iterable", "scripthost", "webworker"]
+    "lib": ["esnext", "dom", "es2017.intl", "dom.iterable", "scripthost", "webworker"]
   },
   "include": [
     "src/**/*.ts",
diff --git a/js/yarn.lock b/js/yarn.lock
index 40efd271..169d5a78 100644
--- a/js/yarn.lock
+++ b/js/yarn.lock
@@ -4221,6 +4221,11 @@ data-urls@^2.0.0:
     whatwg-mimetype "^2.3.0"
     whatwg-url "^8.0.0"
 
+date-fns-tz@^1.1.6:
+  version "1.1.6"
+  resolved "https://registry.yarnpkg.com/date-fns-tz/-/date-fns-tz-1.1.6.tgz#93cbf354e2aeb2cd312ffa32e462c1943cf20a8e"
+  integrity sha512-nyy+URfFI3KUY7udEJozcoftju+KduaqkVfwyTIE0traBiVye09QnyWKLZK7drRr5h9B7sPJITmQnS3U6YOdQg==
+
 date-fns@^2.16.0:
   version "2.25.0"
   resolved "https://registry.yarnpkg.com/date-fns/-/date-fns-2.25.0.tgz#8c5c8f1d958be3809a9a03f4b742eba894fc5680"
diff --git a/lib/federation/activity_pub/actor.ex b/lib/federation/activity_pub/actor.ex
index 7509ee7f..552a879f 100644
--- a/lib/federation/activity_pub/actor.ex
+++ b/lib/federation/activity_pub/actor.ex
@@ -49,7 +49,7 @@ defmodule Mobilizon.Federation.ActivityPub.Actor do
   Create an actor locally by its URL (AP ID)
   """
   @spec make_actor_from_url(url :: String.t(), preload :: boolean()) ::
-          {:ok, Actor.t()} | {:error, make_actor_errors}
+          {:ok, Actor.t()} | {:error, make_actor_errors | Ecto.Changeset.t()}
   def make_actor_from_url(url, preload \\ false) do
     if are_same_origin?(url, Endpoint.url()) do
       {:error, :actor_is_local}
@@ -63,7 +63,7 @@ defmodule Mobilizon.Federation.ActivityPub.Actor do
           Logger.info("Actor #{url} was deleted")
           {:error, :actor_deleted}
 
-        {:error, err} when err in [:http_error, :json_decode_error] ->
+        {:error, err} ->
           {:error, err}
       end
     end
diff --git a/lib/federation/activity_pub/permission.ex b/lib/federation/activity_pub/permission.ex
index 9a14c167..83b910f6 100644
--- a/lib/federation/activity_pub/permission.ex
+++ b/lib/federation/activity_pub/permission.ex
@@ -35,7 +35,7 @@ defmodule Mobilizon.Federation.ActivityPub.Permission do
   @doc """
   Check that actor can create such an object
   """
-  @spec can_create_group_object?(String.t() | integer(), String.t() | integer(), Entity.t()) ::
+  @spec can_create_group_object?(String.t() | integer(), String.t() | integer(), struct()) ::
           boolean()
   def can_create_group_object?(
         actor_id,
diff --git a/lib/federation/activity_pub/types/events.ex b/lib/federation/activity_pub/types/events.ex
index b2a22229..0fdd3f32 100644
--- a/lib/federation/activity_pub/types/events.ex
+++ b/lib/federation/activity_pub/types/events.ex
@@ -156,7 +156,7 @@ defmodule Mobilizon.Federation.ActivityPub.Types.Events do
             role
           )
 
-        {:error, %Ecto.Changeset{} = err} ->
+        {:error, _, %Ecto.Changeset{} = err, _} ->
           {:error, err}
       end
     else
diff --git a/lib/graphql/api/events.ex b/lib/graphql/api/events.ex
index 92d4b111..80d41282 100644
--- a/lib/graphql/api/events.ex
+++ b/lib/graphql/api/events.ex
@@ -12,7 +12,8 @@ defmodule Mobilizon.GraphQL.API.Events do
   @doc """
   Create an event
   """
-  @spec create_event(map) :: {:ok, Activity.t(), Event.t()} | any
+  @spec create_event(map) ::
+          {:ok, Activity.t(), Event.t()} | {:error, atom() | Ecto.Changeset.t()}
   def create_event(args) do
     # For now we don't federate drafts but it will be needed if we want to edit them as groups
     Actions.Create.create(:event, prepare_args(args), should_federate(args))
@@ -21,7 +22,8 @@ defmodule Mobilizon.GraphQL.API.Events do
   @doc """
   Update an event
   """
-  @spec update_event(map, Event.t()) :: {:ok, Activity.t(), Event.t()} | any
+  @spec update_event(map, Event.t()) ::
+          {:ok, Activity.t(), Event.t()} | {:error, atom | Ecto.Changeset.t()}
   def update_event(args, %Event{} = event) do
     Actions.Update.update(event, prepare_args(args), should_federate(args))
   end
diff --git a/lib/graphql/middleware/current_actor_provider.ex b/lib/graphql/middleware/current_actor_provider.ex
index d34eb2a9..abf7384c 100644
--- a/lib/graphql/middleware/current_actor_provider.ex
+++ b/lib/graphql/middleware/current_actor_provider.ex
@@ -16,7 +16,9 @@ defmodule Mobilizon.GraphQL.Middleware.CurrentActorProvider do
         _config
       ) do
     case Cachex.fetch(:default_actors, to_string(user_id), fn -> default(user) end) do
-      {status, %Actor{} = current_actor} when status in [:ok, :commit] ->
+      {status, %Actor{preferred_username: preferred_username} = current_actor}
+      when status in [:ok, :commit] ->
+        Sentry.Context.set_user_context(%{name: preferred_username})
         context = Map.put(context, :current_actor, current_actor)
         %Absinthe.Resolution{resolution | context: context}
 
diff --git a/lib/graphql/resolvers/address.ex b/lib/graphql/resolvers/address.ex
index a2476a8d..bb17ef95 100644
--- a/lib/graphql/resolvers/address.ex
+++ b/lib/graphql/resolvers/address.ex
@@ -11,7 +11,7 @@ defmodule Mobilizon.GraphQL.Resolvers.Address do
   @doc """
   Search an address
   """
-  @spec search(map, map, map) :: {:ok, [Address.t()]}
+  @spec search(map, map, map) :: {:ok, [map()]}
   def search(
         _parent,
         %{query: query, locale: locale, page: _page, limit: _limit} = args,
diff --git a/lib/graphql/resolvers/event.ex b/lib/graphql/resolvers/event.ex
index 4db49fd1..3ea71707 100644
--- a/lib/graphql/resolvers/event.ex
+++ b/lib/graphql/resolvers/event.ex
@@ -13,9 +13,11 @@ defmodule Mobilizon.GraphQL.Resolvers.Event do
 
   alias Mobilizon.Federation.ActivityPub.Activity
   alias Mobilizon.Federation.ActivityPub.Permission
+  alias Mobilizon.Service.TimezoneDetector
   import Mobilizon.Users.Guards, only: [is_moderator: 1]
   import Mobilizon.Web.Gettext
   import Mobilizon.GraphQL.Resolvers.Event.Utils
+  require Logger
 
   # We limit the max number of events that can be retrieved
   @event_max_limit 100
@@ -262,35 +264,47 @@ defmodule Mobilizon.GraphQL.Resolvers.Event do
   def create_event(
         _parent,
         %{organizer_actor_id: organizer_actor_id} = args,
-        %{context: %{current_user: user}} = _resolution
+        %{context: %{current_user: %User{} = user}} = _resolution
       ) do
-    # See https://github.com/absinthe-graphql/absinthe/issues/490
     if Config.only_groups_can_create_events?() and Map.get(args, :attributed_to_id) == nil do
-      {:error, "only groups can create events"}
+      {:error,
+       dgettext(
+         "errors",
+         "Only groups can create events"
+       )}
     else
-      with {:is_owned, %Actor{} = organizer_actor} <- User.owns_actor(user, organizer_actor_id),
-           args <- Map.put(args, :options, args[:options] || %{}),
-           {:group_check, true} <- {:group_check, is_organizer_group_member?(args)},
-           args_with_organizer <- Map.put(args, :organizer_actor, organizer_actor),
-           {:ok, %Activity{data: %{"object" => %{"type" => "Event"}}}, %Event{} = event} <-
-             API.Events.create_event(args_with_organizer) do
-        {:ok, event}
-      else
-        {:group_check, false} ->
-          {:error,
-           dgettext(
-             "errors",
-             "Organizer profile doesn't have permission to create an event on behalf of this group"
-           )}
+      case User.owns_actor(user, organizer_actor_id) do
+        {:is_owned, %Actor{} = organizer_actor} ->
+          if is_organizer_group_member?(args) do
+            args_with_organizer =
+              args |> Map.put(:organizer_actor, organizer_actor) |> extract_timezone(user.id)
+
+            case API.Events.create_event(args_with_organizer) do
+              {:ok, %Activity{data: %{"object" => %{"type" => "Event"}}}, %Event{} = event} ->
+                {:ok, event}
+
+              {:error, %Ecto.Changeset{} = error} ->
+                {:error, error}
+
+              {:error, err} ->
+                Logger.warning("Unknown error while creating event: #{inspect(err)}")
+
+                {:error,
+                 dgettext(
+                   "errors",
+                   "Unknown error while creating event"
+                 )}
+            end
+          else
+            {:error,
+             dgettext(
+               "errors",
+               "Organizer profile doesn't have permission to create an event on behalf of this group"
+             )}
+          end
 
         {:is_owned, nil} ->
           {:error, dgettext("errors", "Organizer profile is not owned by the user")}
-
-        {:error, _, %Ecto.Changeset{} = error, _} ->
-          {:error, error}
-
-        {:error, %Ecto.Changeset{} = error} ->
-          {:error, error}
       end
     end
   end
@@ -314,6 +328,7 @@ defmodule Mobilizon.GraphQL.Resolvers.Event do
 
     with {:ok, %Event{} = event} <- Events.get_event_with_preload(event_id),
          {:ok, args} <- verify_profile_change(args, event, user, actor),
+         args <- extract_timezone(args, user.id),
          {:event_can_be_managed, true} <-
            {:event_can_be_managed, can_event_be_updated_by?(event, actor)},
          {:ok, %Activity{data: %{"object" => %{"type" => "Event"}}}, %Event{} = event} <-
@@ -442,4 +457,42 @@ defmodule Mobilizon.GraphQL.Resolvers.Event do
       {:ok, args}
     end
   end
+
+  @spec extract_timezone(map(), String.t() | integer()) :: map()
+  defp extract_timezone(args, user_id) do
+    event_options = Map.get(args, :options, %{})
+    timezone = Map.get(event_options, :timezone)
+    physical_address = Map.get(args, :physical_address)
+
+    fallback_tz =
+      case Mobilizon.Users.get_setting(user_id) do
+        nil -> nil
+        setting -> setting |> Map.from_struct() |> get_in([:timezone])
+      end
+
+    timezone = determine_timezone(timezone, physical_address, fallback_tz)
+
+    event_options = Map.put(event_options, :timezone, timezone)
+
+    Map.put(args, :options, event_options)
+  end
+
+  @spec determine_timezone(
+          String.t() | nil,
+          any(),
+          String.t() | nil
+        ) :: String.t() | nil
+  defp determine_timezone(timezone, physical_address, fallback_tz) do
+    case physical_address do
+      physical_address when is_map(physical_address) ->
+        TimezoneDetector.detect(
+          timezone,
+          physical_address.geom,
+          fallback_tz
+        )
+
+      _ ->
+        timezone || fallback_tz
+    end
+  end
 end
diff --git a/lib/graphql/schema/address.ex b/lib/graphql/schema/address.ex
index bb1c1f62..bee6ac9c 100644
--- a/lib/graphql/schema/address.ex
+++ b/lib/graphql/schema/address.ex
@@ -21,6 +21,7 @@ defmodule Mobilizon.GraphQL.Schema.AddressType do
     field(:url, :string, description: "The address's URL")
     field(:id, :id, description: "The address's ID")
     field(:origin_id, :string, description: "The address's original ID from the provider")
+    field(:timezone, :string, description: "The (estimated) timezone of the location")
   end
 
   @desc """
@@ -54,6 +55,7 @@ defmodule Mobilizon.GraphQL.Schema.AddressType do
     field(:url, :string, description: "The address's URL")
     field(:id, :id, description: "The address's ID")
     field(:origin_id, :string, description: "The address's original ID from the provider")
+    field(:timezone, :string, description: "The (estimated) timezone of the location")
   end
 
   @desc """
diff --git a/lib/graphql/schema/event.ex b/lib/graphql/schema/event.ex
index 2bfe5993..ba515906 100644
--- a/lib/graphql/schema/event.ex
+++ b/lib/graphql/schema/event.ex
@@ -237,6 +237,8 @@ defmodule Mobilizon.GraphQL.Schema.EventType do
     field(:show_start_time, :boolean, description: "Show event start time")
     field(:show_end_time, :boolean, description: "Show event end time")
 
+    field(:timezone, :string, description: "The event's timezone")
+
     field(:hide_organizer_when_group_event, :boolean,
       description:
         "Whether to show or hide the person organizer when event is organized by a group"
@@ -286,6 +288,8 @@ defmodule Mobilizon.GraphQL.Schema.EventType do
     field(:show_start_time, :boolean, description: "Show event start time")
     field(:show_end_time, :boolean, description: "Show event end time")
 
+    field(:timezone, :string, description: "The event's timezone")
+
     field(:hide_organizer_when_group_event, :boolean,
       description:
         "Whether to show or hide the person organizer when event is organized by a group"
@@ -393,7 +397,7 @@ defmodule Mobilizon.GraphQL.Schema.EventType do
 
       arg(:category, :string, default_value: "meeting", description: "The event's category")
       arg(:physical_address, :address_input, description: "The event's physical address")
-      arg(:options, :event_options_input, description: "The event options")
+      arg(:options, :event_options_input, default_value: %{}, description: "The event options")
       arg(:metadata, list_of(:event_metadata_input), description: "The event metadata")
 
       arg(:draft, :boolean,
diff --git a/lib/mobilizon.ex b/lib/mobilizon.ex
index 1b9816cc..a6f9e640 100644
--- a/lib/mobilizon.ex
+++ b/lib/mobilizon.ex
@@ -48,6 +48,7 @@ defmodule Mobilizon do
         Guardian.DB.Token.SweeperServer,
         ActivityPub.Federator,
         Mobilizon.PythonWorker,
+        TzWorld.Backend.DetsWithIndexCache,
         cachex_spec(:feed, 2500, 60, 60, &Feed.create_cache/1),
         cachex_spec(:ics, 2500, 60, 60, &ICalendar.create_cache/1),
         cachex_spec(
diff --git a/lib/mobilizon/addresses/address.ex b/lib/mobilizon/addresses/address.ex
index edd02ac8..89845102 100644
--- a/lib/mobilizon/addresses/address.ex
+++ b/lib/mobilizon/addresses/address.ex
@@ -12,17 +12,18 @@ defmodule Mobilizon.Addresses.Address do
   alias Mobilizon.Web.Endpoint
 
   @type t :: %__MODULE__{
-          country: String.t(),
-          locality: String.t(),
-          region: String.t(),
-          description: String.t(),
-          geom: Geo.PostGIS.Geometry.t(),
-          postal_code: String.t(),
-          street: String.t(),
-          type: String.t(),
+          country: String.t() | nil,
+          locality: String.t() | nil,
+          region: String.t() | nil,
+          description: String.t() | nil,
+          geom: Geo.PostGIS.Geometry.t() | nil,
+          postal_code: String.t() | nil,
+          street: String.t() | nil,
+          type: String.t() | nil,
           url: String.t(),
-          origin_id: String.t(),
-          events: [Event.t()]
+          origin_id: String.t() | nil,
+          events: [Event.t()],
+          timezone: String.t() | nil
         }
 
   @required_attrs [:url]
@@ -35,7 +36,8 @@ defmodule Mobilizon.Addresses.Address do
     :postal_code,
     :street,
     :origin_id,
-    :type
+    :type,
+    :timezone
   ]
   @attrs @required_attrs ++ @optional_attrs
 
@@ -50,6 +52,7 @@ defmodule Mobilizon.Addresses.Address do
     field(:type, :string)
     field(:url, :string)
     field(:origin_id, :string)
+    field(:timezone, :string)
 
     has_many(:events, Event, foreign_key: :physical_address_id)
 
@@ -61,6 +64,7 @@ defmodule Mobilizon.Addresses.Address do
   def changeset(%__MODULE__{} = address, attrs) do
     address
     |> cast(attrs, @attrs)
+    |> maybe_set_timezone()
     |> set_url()
     |> validate_required(@required_attrs)
     |> unique_constraint(:url, name: :addresses_url_index)
@@ -90,4 +94,29 @@ defmodule Mobilizon.Addresses.Address do
       "#{address.street} #{address.postal_code} #{address.locality} #{address.region} #{address.country}"
     )
   end
+
+  @spec maybe_set_timezone(Ecto.Changeset.t()) :: Ecto.Changeset.t()
+  defp maybe_set_timezone(%Ecto.Changeset{} = changeset) do
+    case get_change(changeset, :geom) do
+      nil ->
+        changeset
+
+      geom ->
+        case get_field(changeset, :timezone) do
+          # Only update the timezone if the geom has change and we don't already have a set timezone
+          nil -> put_change(changeset, :timezone, timezone(geom))
+          _ -> changeset
+        end
+    end
+  end
+
+  @spec timezone(Geo.PostGIS.Geometry.t() | nil) :: String.t() | nil
+  defp timezone(nil), do: nil
+
+  defp timezone(geom) do
+    case TzWorld.timezone_at(geom) do
+      {:ok, tz} -> tz
+      {:error, _err} -> nil
+    end
+  end
 end
diff --git a/lib/mobilizon/events/event_options.ex b/lib/mobilizon/events/event_options.ex
index 30336975..b641b201 100644
--- a/lib/mobilizon/events/event_options.ex
+++ b/lib/mobilizon/events/event_options.ex
@@ -27,6 +27,7 @@ defmodule Mobilizon.Events.EventOptions do
           participation_condition: [EventParticipationCondition.t()],
           show_start_time: boolean,
           show_end_time: boolean,
+          timezone: String.t() | nil,
           hide_organizer_when_group_event: boolean
         }
 
@@ -41,6 +42,7 @@ defmodule Mobilizon.Events.EventOptions do
     :show_participation_price,
     :show_start_time,
     :show_end_time,
+    :timezone,
     :hide_organizer_when_group_event
   ]
 
@@ -57,6 +59,7 @@ defmodule Mobilizon.Events.EventOptions do
     field(:show_participation_price, :boolean)
     field(:show_start_time, :boolean, default: true)
     field(:show_end_time, :boolean, default: true)
+    field(:timezone, :string)
     field(:hide_organizer_when_group_event, :boolean, default: false)
 
     embeds_many(:offers, EventOffer)
diff --git a/lib/mobilizon/events/events.ex b/lib/mobilizon/events/events.ex
index a1f9aeef..83001cb1 100644
--- a/lib/mobilizon/events/events.ex
+++ b/lib/mobilizon/events/events.ex
@@ -401,7 +401,8 @@ defmodule Mobilizon.Events do
     |> Page.build_page(page, limit)
   end
 
-  @spec list_organized_events_for_actor(Actor.t(), integer | nil, integer | nil) :: Page.t()
+  @spec list_organized_events_for_actor(Actor.t(), integer | nil, integer | nil) ::
+          Page.t(Event.t())
   def list_organized_events_for_actor(%Actor{id: actor_id}, page \\ nil, limit \\ nil) do
     actor_id
     |> event_for_actor_query(desc: :begins_on)
@@ -409,13 +410,15 @@ defmodule Mobilizon.Events do
     |> Page.build_page(page, limit)
   end
 
+  @spec list_simple_organized_events_for_group(Actor.t(), integer | nil, integer | nil) ::
+          Page.t(Event.t())
   def list_simple_organized_events_for_group(%Actor{} = actor, page \\ nil, limit \\ nil) do
     list_organized_events_for_group(actor, :all, nil, nil, page, limit)
   end
 
   @spec list_organized_events_for_group(
           Actor.t(),
-          EventVisibility.t(),
+          EventVisibility.t() | :all,
           DateTime.t() | nil,
           DateTime.t() | nil,
           integer | nil,
@@ -885,7 +888,9 @@ defmodule Mobilizon.Events do
   @doc """
   Creates a participant.
   """
-  @spec create_participant(map) :: {:ok, Participant.t()} | {:error, Changeset.t()}
+  @spec create_participant(map) ::
+          {:ok, Participant.t()}
+          | {:error, :participant | :update_event_participation_stats, Changeset.t(), map()}
   def create_participant(attrs \\ %{}, update_event_participation_stats \\ true) do
     with {:ok, %{participant: %Participant{} = participant}} <-
            Multi.new()
@@ -912,7 +917,8 @@ defmodule Mobilizon.Events do
   Updates a participant.
   """
   @spec update_participant(Participant.t(), map) ::
-          {:ok, Participant.t()} | {:error, Changeset.t()}
+          {:ok, Participant.t()}
+          | {:error, :participant | :update_event_participation_stats, Changeset.t(), map()}
   def update_participant(%Participant{role: old_role} = participant, attrs) do
     with {:ok, %{participant: %Participant{} = participant}} <-
            Multi.new()
@@ -1625,11 +1631,12 @@ defmodule Mobilizon.Events do
     from(p in query, where: p.role == ^role)
   end
 
+  @spec event_filter_visibility(Ecto.Queryable.t(), :public | :all) ::
+          Ecto.Queryable.t() | Ecto.Query.t()
   defp event_filter_visibility(query, :all), do: query
 
   defp event_filter_visibility(query, :public) do
-    query
-    |> where(visibility: ^:public, draft: false)
+    where(query, visibility: ^:public, draft: false)
   end
 
   defp event_filter_begins_on(query, nil, nil),
diff --git a/lib/service/geospatial/addok.ex b/lib/service/geospatial/addok.ex
index d9c196db..faecdb20 100644
--- a/lib/service/geospatial/addok.ex
+++ b/lib/service/geospatial/addok.ex
@@ -66,12 +66,15 @@ defmodule Mobilizon.Service.Geospatial.Addok do
   defp process_data(features) do
     features
     |> Enum.map(fn %{"geometry" => geometry, "properties" => properties} ->
+      coordinates = geometry |> Map.get("coordinates") |> Provider.coordinates()
+
       %Address{
         country: Map.get(properties, "country", default_country()),
         locality: Map.get(properties, "city"),
         region: Map.get(properties, "context"),
         description: Map.get(properties, "name") || street_address(properties),
-        geom: geometry |> Map.get("coordinates") |> Provider.coordinates(),
+        geom: coordinates,
+        timezone: Provider.timezone(coordinates),
         postal_code: Map.get(properties, "postcode"),
         street: properties |> street_address()
       }
diff --git a/lib/service/geospatial/google_maps.ex b/lib/service/geospatial/google_maps.ex
index 936e000f..47dc9179 100644
--- a/lib/service/geospatial/google_maps.ex
+++ b/lib/service/geospatial/google_maps.ex
@@ -124,12 +124,15 @@ defmodule Mobilizon.Service.Geospatial.GoogleMaps do
         description
       end
 
+    coordinates = Provider.coordinates([lon, lat])
+
     %Address{
       country: Map.get(components, "country"),
       locality: Map.get(components, "locality"),
       region: Map.get(components, "administrative_area_level_1"),
       description: description,
-      geom: [lon, lat] |> Provider.coordinates(),
+      geom: coordinates,
+      timezone: Provider.timezone(coordinates),
       postal_code: Map.get(components, "postal_code"),
       street: street_address(components),
       origin_id: "gm:" <> to_string(place_id)
diff --git a/lib/service/geospatial/map_quest.ex b/lib/service/geospatial/map_quest.ex
index 155a53df..4d27e57b 100644
--- a/lib/service/geospatial/map_quest.ex
+++ b/lib/service/geospatial/map_quest.ex
@@ -98,12 +98,15 @@ defmodule Mobilizon.Service.Geospatial.MapQuest do
   end
 
   defp produce_address(address, lat, lng) do
+    coordinates = Provider.coordinates([lng, lat])
+
     %Address{
       country: Map.get(address, "adminArea1"),
       locality: Map.get(address, "adminArea5"),
       region: Map.get(address, "adminArea3"),
       description: Map.get(address, "street"),
-      geom: [lng, lat] |> Provider.coordinates(),
+      geom: coordinates,
+      timezone: Provider.timezone(coordinates),
       postal_code: Map.get(address, "postalCode"),
       street: Map.get(address, "street")
     }
diff --git a/lib/service/geospatial/mimirsbrunn.ex b/lib/service/geospatial/mimirsbrunn.ex
index d718f9d9..3dafed63 100644
--- a/lib/service/geospatial/mimirsbrunn.ex
+++ b/lib/service/geospatial/mimirsbrunn.ex
@@ -75,7 +75,8 @@ defmodule Mobilizon.Service.Geospatial.Mimirsbrunn do
                      "properties" => %{"geocoding" => geocoding}
                    } ->
       address = process_address(geocoding)
-      %Address{address | geom: Provider.coordinates(coordinates)}
+      coordinates = Provider.coordinates(coordinates)
+      %Address{address | geom: coordinates, timezone: Provider.timezone(coordinates)}
     end)
   end
 
diff --git a/lib/service/geospatial/nominatim.ex b/lib/service/geospatial/nominatim.ex
index c32e7ebc..85754df9 100644
--- a/lib/service/geospatial/nominatim.ex
+++ b/lib/service/geospatial/nominatim.ex
@@ -75,7 +75,8 @@ defmodule Mobilizon.Service.Geospatial.Nominatim do
                      "properties" => %{"geocoding" => geocoding}
                    } ->
       address = process_address(geocoding)
-      %Address{address | geom: Provider.coordinates(coordinates)}
+      coordinates = Provider.coordinates(coordinates)
+      %Address{address | geom: coordinates, timezone: Provider.timezone(coordinates)}
     end)
   end
 
diff --git a/lib/service/geospatial/pelias.ex b/lib/service/geospatial/pelias.ex
index 6622124b..72ed452a 100644
--- a/lib/service/geospatial/pelias.ex
+++ b/lib/service/geospatial/pelias.ex
@@ -76,7 +76,8 @@ defmodule Mobilizon.Service.Geospatial.Pelias do
                      "properties" => properties
                    } ->
       address = process_address(properties)
-      %Address{address | geom: Provider.coordinates(coordinates)}
+      coordinates = Provider.coordinates(coordinates)
+      %Address{address | geom: coordinates, timezone: Provider.timezone(coordinates)}
     end)
   end
 
diff --git a/lib/service/geospatial/photon.ex b/lib/service/geospatial/photon.ex
index ef47bb7f..83891450 100644
--- a/lib/service/geospatial/photon.ex
+++ b/lib/service/geospatial/photon.ex
@@ -69,12 +69,15 @@ defmodule Mobilizon.Service.Geospatial.Photon do
   defp process_data(features) do
     features
     |> Enum.map(fn %{"geometry" => geometry, "properties" => properties} ->
+      coordinates = geometry |> Map.get("coordinates") |> Provider.coordinates()
+
       %Address{
         country: Map.get(properties, "country"),
         locality: Map.get(properties, "city"),
         region: Map.get(properties, "state"),
         description: Map.get(properties, "name") || street_address(properties),
-        geom: geometry |> Map.get("coordinates") |> Provider.coordinates(),
+        geom: coordinates,
+        timezone: Provider.timezone(coordinates),
         postal_code: Map.get(properties, "postcode"),
         street: properties |> street_address()
       }
diff --git a/lib/service/geospatial/provider.ex b/lib/service/geospatial/provider.ex
index 8c20712c..3f08bb16 100644
--- a/lib/service/geospatial/provider.ex
+++ b/lib/service/geospatial/provider.ex
@@ -79,6 +79,19 @@ defmodule Mobilizon.Service.Geospatial.Provider do
 
   def coordinates(_), do: nil
 
+  @doc """
+  Returns the timezone for a Geo.Point
+  """
+  @spec timezone(nil | Geo.Point.t()) :: nil | String.t()
+  def timezone(nil), do: nil
+
+  def timezone(%Geo.Point{} = point) do
+    case TzWorld.timezone_at(point) do
+      {:ok, tz} -> tz
+      {:error, _err} -> nil
+    end
+  end
+
   @spec endpoint(atom()) :: String.t()
   def endpoint(provider) do
     Application.get_env(:mobilizon, provider) |> get_in([:endpoint])
diff --git a/lib/service/metadata/event.ex b/lib/service/metadata/event.ex
index e88c2bc9..cf47ea4f 100644
--- a/lib/service/metadata/event.ex
+++ b/lib/service/metadata/event.ex
@@ -2,7 +2,7 @@ defimpl Mobilizon.Service.Metadata, for: Mobilizon.Events.Event do
   alias Phoenix.HTML
   alias Phoenix.HTML.Tag
   alias Mobilizon.Addresses.Address
-  alias Mobilizon.Events.Event
+  alias Mobilizon.Events.{Event, EventOptions}
   alias Mobilizon.Web.JsonLD.ObjectView
 
   import Mobilizon.Service.Metadata.Utils,
@@ -53,20 +53,52 @@ defimpl Mobilizon.Service.Metadata, for: Mobilizon.Events.Event do
          %Event{
            description: description,
            begins_on: begins_on,
-           physical_address: %Address{} = address
+           physical_address: address,
+           options: %EventOptions{timezone: timezone},
+           language: language
          },
          locale
        ) do
-    "#{datetime_to_string(begins_on, locale)} - #{render_address(address)} - #{process_description(description, locale)}"
+    language = build_language(language, locale)
+    begins_on = build_begins_on(begins_on, timezone, language)
+
+    begins_on
+    |> datetime_to_string(language)
+    |> (&[&1]).()
+    |> add_timezone(begins_on)
+    |> maybe_build_address(address)
+    |> build_description(description, language)
+    |> Enum.join(" - ")
   end
 
-  defp description(
-         %Event{
-           description: description,
-           begins_on: begins_on
-         },
-         locale
-       ) do
-    "#{datetime_to_string(begins_on, locale)} - #{process_description(description, locale)}"
+  @spec build_language(String.t() | nil, String.t()) :: String.t()
+  defp build_language(language, locale), do: language || locale
+
+  @spec build_begins_on(DateTime.t(), String.t() | nil, String.t()) :: DateTime.t()
+  defp build_begins_on(begins_on, timezone, language) do
+    if timezone do
+      case DateTime.shift_zone(begins_on, timezone) do
+        {:ok, begins_on} -> begins_on
+        {:error, _err} -> begins_on
+      end
+    else
+      begins_on
+    end
+  end
+
+  defp add_timezone(elements, %DateTime{} = begins_on) do
+    elements ++ [Cldr.DateTime.Formatter.zone_gmt(begins_on)]
+  end
+
+  @spec maybe_build_address(list(String.t()), Address.t() | nil) :: list(String.t())
+  defp maybe_build_address(elements, %Address{} = address) do
+    elements ++ [render_address(address)]
+  end
+
+  defp maybe_build_address(elements, _address), do: elements
+
+  @spec build_description(list(String.t()), String.t(), String.t()) :: list(String.t())
+  defp build_description(elements, description, language) do
+    elements ++ [process_description(description, language)]
   end
 end
diff --git a/lib/service/timezone_detector.ex b/lib/service/timezone_detector.ex
new file mode 100644
index 00000000..fe0ad35e
--- /dev/null
+++ b/lib/service/timezone_detector.ex
@@ -0,0 +1,40 @@
+defmodule Mobilizon.Service.TimezoneDetector do
+  @moduledoc """
+  Detect the timezone from a point
+  """
+
+  @type detectable :: Geo.Point.t() | Geo.PointZ.t() | {float() | float()}
+
+  @doc """
+  Detect the most appropriate timezone from a value, a geographic set of coordinates and a fallback
+  """
+  @spec detect(String.t() | nil, detectable(), String.t()) :: String.t()
+  def detect(nil, geo, fallback) do
+    case TzWorld.timezone_at(geo) do
+      {:ok, timezone} ->
+        timezone
+
+      {:error, :time_zone_not_found} ->
+        fallback
+    end
+  end
+
+  def detect(timezone, geo, fallback) do
+    if Tzdata.zone_exists?(timezone) do
+      timezone
+    else
+      detect(nil, geo, fallback)
+    end
+  end
+
+  @spec detect(String.t() | nil, String.t()) :: String.t()
+  def detect(nil, fallback), do: fallback
+
+  def detect(timezone, fallback) do
+    if Tzdata.zone_exists?(timezone) do
+      timezone
+    else
+      fallback
+    end
+  end
+end
diff --git a/lib/web/auth/context.ex b/lib/web/auth/context.ex
index dbf216c9..4e3eaaae 100644
--- a/lib/web/auth/context.ex
+++ b/lib/web/auth/context.ex
@@ -27,23 +27,30 @@ defmodule Mobilizon.Web.Auth.Context do
 
     user_agent = conn |> Plug.Conn.get_req_header("user-agent") |> List.first()
 
+    if SentryAdapter.enabled?() do
+      Sentry.Context.set_request_context(%{
+        url: Plug.Conn.request_url(conn),
+        method: conn.method,
+        headers: %{
+          "User-Agent": user_agent,
+          Referer: conn |> Plug.Conn.get_req_header("referer") |> List.first()
+        },
+        query_string: conn.query_string,
+        env: %{
+          REQUEST_ID: conn |> Plug.Conn.get_resp_header("x-request-id") |> List.first(),
+          SERVER_NAME: conn.host
+        }
+      })
+    end
+
     {conn, context} =
       case Guardian.Plug.current_resource(conn) do
         %User{id: user_id, email: user_email} = user ->
           if SentryAdapter.enabled?() do
-            Sentry.Context.set_user_context(%{id: user_id, name: user_email})
-
-            Sentry.Context.set_request_context(%{
-              url: Plug.Conn.request_url(conn),
-              method: conn.method,
-              headers: %{
-                "User-Agent": user_agent
-              },
-              query_string: conn.query_string,
-              env: %{
-                REQUEST_ID: conn |> Plug.Conn.get_resp_header("x-request-id") |> List.first(),
-                SERVER_NAME: conn.host
-              }
+            Sentry.Context.set_user_context(%{
+              id: user_id,
+              email: user_email,
+              ip_address: context.ip
             })
           end
 
diff --git a/mix.exs b/mix.exs
index 127b768d..c1cb4d56 100644
--- a/mix.exs
+++ b/mix.exs
@@ -206,6 +206,7 @@ defmodule Mobilizon.Mixfile do
       {:paasaa, "~> 0.5.0"},
       {:nimble_csv, "~> 1.1"},
       {:export, "~> 0.1.0"},
+      {:tz_world, "~> 0.5.0"},
       # Dev and test dependencies
       {:phoenix_live_reload, "~> 1.2", only: [:dev, :e2e]},
       {:ex_machina, "~> 2.3", only: [:dev, :test]},
diff --git a/mix.lock b/mix.lock
index e0792c07..af28ed58 100644
--- a/mix.lock
+++ b/mix.lock
@@ -131,6 +131,7 @@
   "telemetry": {:hex, :telemetry, "1.0.0", "0f453a102cdf13d506b7c0ab158324c337c41f1cc7548f0bc0e130bbf0ae9452", [:rebar3], [], "hexpm", "73bc09fa59b4a0284efb4624335583c528e07ec9ae76aca96ea0673850aec57a"},
   "tesla": {:hex, :tesla, "1.4.3", "f5a494e08fb1abe4fd9c28abb17f3d9b62b8f6fc492860baa91efb1aab61c8a0", [:mix], [{:castore, "~> 0.1", [hex: :castore, repo: "hexpm", optional: true]}, {:exjsx, ">= 3.0.0", [hex: :exjsx, repo: "hexpm", optional: true]}, {:finch, "~> 0.3", [hex: :finch, repo: "hexpm", optional: true]}, {:fuse, "~> 2.4", [hex: :fuse, repo: "hexpm", optional: true]}, {:gun, "~> 1.3", [hex: :gun, repo: "hexpm", optional: true]}, {:hackney, "~> 1.6", [hex: :hackney, repo: "hexpm", optional: true]}, {:ibrowse, "4.4.0", [hex: :ibrowse, repo: "hexpm", optional: true]}, {:jason, ">= 1.0.0", [hex: :jason, repo: "hexpm", optional: true]}, {:mime, "~> 1.0", [hex: :mime, repo: "hexpm", optional: false]}, {:mint, "~> 1.0", [hex: :mint, repo: "hexpm", optional: true]}, {:poison, ">= 1.0.0", [hex: :poison, repo: "hexpm", optional: true]}, {:telemetry, "~> 0.4 or ~> 1.0", [hex: :telemetry, repo: "hexpm", optional: true]}], "hexpm", "e0755bb664bf4d664af72931f320c97adbf89da4586670f4864bf259b5750386"},
   "timex": {:hex, :timex, "3.7.6", "502d2347ec550e77fdf419bc12d15bdccd31266bb7d925b30bf478268098282f", [:mix], [{:combine, "~> 0.10", [hex: :combine, repo: "hexpm", optional: false]}, {:gettext, "~> 0.10", [hex: :gettext, repo: "hexpm", optional: false]}, {:tzdata, "~> 1.0", [hex: :tzdata, repo: "hexpm", optional: false]}], "hexpm", "a296327f79cb1ec795b896698c56e662ed7210cc9eb31f0ab365eb3a62e2c589"},
+  "tz_world": {:hex, :tz_world, "0.5.0", "fb93adb6ec9a32bbf1664d84083bb426b5273a31d4051a93654feaf9feb96b33", [:mix], [{:castore, "~> 0.1", [hex: :castore, repo: "hexpm", optional: true]}, {:certifi, "~> 2.5", [hex: :certifi, repo: "hexpm", optional: true]}, {:geo, "~> 1.0 or ~> 2.0 or ~> 3.0", [hex: :geo, repo: "hexpm", optional: false]}, {:jason, "~> 1.0", [hex: :jason, repo: "hexpm", optional: false]}], "hexpm", "df236849eff87a36c436b557803fb72b57f10dbc3f5d44cd1c06324e0c8447bb"},
   "tzdata": {:hex, :tzdata, "1.1.0", "72f5babaa9390d0f131465c8702fa76da0919e37ba32baa90d93c583301a8359", [:mix], [{:hackney, "~> 1.17", [hex: :hackney, repo: "hexpm", optional: false]}], "hexpm", "18f453739b48d3dc5bcf0e8906d2dc112bb40baafe2c707596d89f3c8dd14034"},
   "ueberauth": {:hex, :ueberauth, "0.6.3", "d42ace28b870e8072cf30e32e385579c57b9cc96ec74fa1f30f30da9c14f3cc0", [:mix], [{:plug, "~> 1.5", [hex: :plug, repo: "hexpm", optional: false]}], "hexpm", "afc293d8a1140d6591b53e3eaf415ca92842cb1d32fad3c450c6f045f7f91b60"},
   "ueberauth_discord": {:hex, :ueberauth_discord, "0.6.0", "d6ec040e4195c4138b9a959c79024ab4c213ba1aed9fc08099ecff141a6486da", [:mix], [{:oauth2, "~> 1.0 or ~> 2.0", [hex: :oauth2, repo: "hexpm", optional: false]}, {:ueberauth, "~> 0.6.3", [hex: :ueberauth, repo: "hexpm", optional: false]}], "hexpm", "c5ea960191c1d6c3a974947cae4d57efa565a9a0796b8e82bee45fac7ae2fabc"},
diff --git a/priv/repo/migrations/20211008084901_add_timezone_to_addresses.exs b/priv/repo/migrations/20211008084901_add_timezone_to_addresses.exs
new file mode 100644
index 00000000..b099b27d
--- /dev/null
+++ b/priv/repo/migrations/20211008084901_add_timezone_to_addresses.exs
@@ -0,0 +1,9 @@
+defmodule Mobilizon.Storage.Repo.Migrations.AddTimezoneToAddresses do
+  use Ecto.Migration
+
+  def change do
+    alter table(:addresses) do
+      add(:timezone, :string)
+    end
+  end
+end