diff --git a/README.org b/README.org
index 5b67bd4..f46b78c 100644
--- a/README.org
+++ b/README.org
@@ -1355,6 +1355,28 @@ execvp("emacsclient", ("-n", payload))
 2. [[https://www.hammerspoon.org/][Hammerspoon]]
 3. [[https://vritser.github.io/posts/capture-anywhere/][Emacs Capture Anywhere]]
 
+* [[info:emacs#Calendar/Diary][Calendar, Diary, and Time (info)]]
+:PROPERTIES:
+:CUSTOM_ID: sec:time
+:END:
+
+#+caption[Set =world-clock= options]:
+#+caption: Set =world-clock= options.
+#+name: lst:set-world-clock-options
+#+begin_src emacs-lisp -n :results silent
+(with-eval-after-load 'time
+  (setopt world-clock-list
+          '(("America/Los_Angeles" "Seattle")
+            ("America/New_York" "New York")
+            ("Europe/London" "London")
+            ("Europe/Paris" "Paris")
+            ("Europe/Istanbul" "Istanbul")
+            ("Asia/Jerusalem" "Jerusalem")
+            ("Asia/Singapore" "Singapore")
+            ("Asia/Tokyo" "Tokyo"))
+          world-clock-time-format "%a %d %b %R %z"))
+#+end_src
+
 * Tools to handle buffers and modes
 :PROPERTIES:
 :CUSTOM_ID: sec:buffer-mode-tools