diff --git a/lib/service/date_time/date_time.ex b/lib/service/date_time/date_time.ex
index bccf9e7d..dbceb7cc 100644
--- a/lib/service/date_time/date_time.ex
+++ b/lib/service/date_time/date_time.ex
@@ -3,6 +3,8 @@ defmodule Mobilizon.Service.DateTime do
   Module to represent a datetime in a given locale
   """
   alias Cldr.DateTime.Relative
+  alias Mobilizon.Cldr, as: MobilizonCldr
+  import Mobilizon.Cldr, only: [locale_or_default: 1]
 
   @typep to_string_format :: :short | :medium | :long | :full
 
@@ -10,25 +12,25 @@ defmodule Mobilizon.Service.DateTime do
 
   @spec datetime_to_string(DateTime.t(), String.t(), to_string_format()) :: String.t()
   def datetime_to_string(%DateTime{} = datetime, locale \\ "en", format \\ :medium) do
-    Mobilizon.Cldr.DateTime.to_string!(datetime,
+    MobilizonCldr.DateTime.to_string!(datetime,
       format: format,
-      locale: Mobilizon.Cldr.locale_or_default(locale)
+      locale: locale_or_default(locale)
     )
   end
 
   @spec datetime_to_time_string(DateTime.t(), String.t(), to_string_format()) :: String.t()
   def datetime_to_time_string(%DateTime{} = datetime, locale \\ "en", format \\ :short) do
-    Mobilizon.Cldr.Time.to_string!(datetime,
+    MobilizonCldr.Time.to_string!(datetime,
       format: format,
-      locale: Mobilizon.Cldr.locale_or_default(locale)
+      locale: locale_or_default(locale)
     )
   end
 
   @spec datetime_to_date_string(DateTime.t(), String.t(), to_string_format()) :: String.t()
   def datetime_to_date_string(%DateTime{} = datetime, locale \\ "en", format \\ :short) do
-    Mobilizon.Cldr.Date.to_string!(datetime,
+    MobilizonCldr.Date.to_string!(datetime,
       format: format,
-      locale: Mobilizon.Cldr.locale_or_default(locale)
+      locale: locale_or_default(locale)
     )
   end
 
@@ -47,9 +49,9 @@ defmodule Mobilizon.Service.DateTime do
 
   @spec datetime_relative(DateTime.t(), String.t()) :: String.t()
   def datetime_relative(%DateTime{} = datetime, locale \\ "en") do
-    Relative.to_string!(datetime, Mobilizon.Cldr,
+    Relative.to_string!(datetime, MobilizonCldr,
       relative_to: DateTime.utc_now(),
-      locale: Mobilizon.Cldr.locale_or_default(locale)
+      locale: locale_or_default(locale)
     )
   end
 
diff --git a/lib/service/export/participants/common.ex b/lib/service/export/participants/common.ex
index afc0b9d8..84c848e1 100644
--- a/lib/service/export/participants/common.ex
+++ b/lib/service/export/participants/common.ex
@@ -9,6 +9,7 @@ defmodule Mobilizon.Service.Export.Participants.Common do
   alias Mobilizon.Events.Participant.Metadata
   alias Mobilizon.Storage.Repo
   import Mobilizon.Web.Gettext, only: [gettext: 1]
+  import Mobilizon.Service.DateTime, only: [datetime_to_string: 2]
 
   @spec save_upload(String.t(), String.t(), String.t(), String.t(), String.t()) ::
           {:ok, Export.t()} | {:error, atom() | Ecto.Changeset.t()}
@@ -58,7 +59,12 @@ defmodule Mobilizon.Service.Export.Participants.Common do
 
   @spec columns :: list(String.t())
   def columns do
-    [gettext("Participant name"), gettext("Participant status"), gettext("Participant message")]
+    [
+      gettext("Participant name"),
+      gettext("Participant status"),
+      gettext("Participant registration date"),
+      gettext("Participant message")
+    ]
   end
 
   # One hour
@@ -82,14 +88,26 @@ defmodule Mobilizon.Service.Export.Participants.Common do
 
   @spec to_list({Participant.t(), Actor.t()}) :: list(String.t())
   def to_list(
-        {%Participant{role: role, metadata: metadata},
+        {%Participant{role: role, metadata: metadata, inserted_at: inserted_at},
          %Actor{domain: nil, preferred_username: "anonymous"}}
       ) do
-    [gettext("Anonymous participant"), translate_role(role), convert_metadata(metadata)]
+    [
+      gettext("Anonymous participant"),
+      translate_role(role),
+      datetime_to_string(inserted_at, Gettext.get_locale()),
+      convert_metadata(metadata)
+    ]
   end
 
-  def to_list({%Participant{role: role, metadata: metadata}, %Actor{} = actor}) do
-    [Actor.display_name_and_username(actor), translate_role(role), convert_metadata(metadata)]
+  def to_list(
+        {%Participant{role: role, metadata: metadata, inserted_at: inserted_at}, %Actor{} = actor}
+      ) do
+    [
+      Actor.display_name_and_username(actor),
+      translate_role(role),
+      datetime_to_string(inserted_at, Gettext.get_locale()),
+      convert_metadata(metadata)
+    ]
   end
 
   @spec convert_metadata(Metadata.t() | nil) :: String.t()
diff --git a/test/service/export/participants/common_test.exs b/test/service/export/participants/common_test.exs
index 83077286..df0bb058 100644
--- a/test/service/export/participants/common_test.exs
+++ b/test/service/export/participants/common_test.exs
@@ -5,24 +5,28 @@ defmodule Mobilizon.Service.Export.Participants.CommonTest do
 
   alias Mobilizon.Actors.Actor
   alias Mobilizon.Service.Export.Participants.Common
+  import Mobilizon.Service.DateTime, only: [datetime_to_string: 1]
 
   test "convert participants to list items" do
     participant = insert(:participant)
     actor = insert(:actor)
     name = Actor.display_name_and_username(actor)
-    assert [^name, _, ""] = Common.to_list({participant, actor})
+    date = datetime_to_string(participant.inserted_at)
+    assert [^name, _, ^date, ""] = Common.to_list({participant, actor})
   end
 
   test "convert participants with metadata to list items" do
     participant = insert(:participant, metadata: %{message: "a message"})
     actor = insert(:actor)
     name = Actor.display_name_and_username(actor)
-    assert [^name, _, "a message"] = Common.to_list({participant, actor})
+    date = datetime_to_string(participant.inserted_at)
+    assert [^name, _, ^date, "a message"] = Common.to_list({participant, actor})
   end
 
   test "convert anonymous participants to list items" do
     participant = insert(:participant)
     actor = insert(:actor, domain: nil, preferred_username: "anonymous")
-    assert ["Anonymous participant", _, ""] = Common.to_list({participant, actor})
+    date = datetime_to_string(participant.inserted_at)
+    assert ["Anonymous participant", _, ^date, ""] = Common.to_list({participant, actor})
   end
 end