user docs: Update view-the-exact-time-a-message-was-sent.

templates/zerver/help/verify-that-your-message-has-been-successfully-sent.md

@@ -38,8 +38,6 @@ error in your browser window.
 5. A few seconds later, your message will be updated to contain the
 timestamp on the right side of the message body.
 
-    ![Message time](/static/images/help/message-exact-time.png)
-
 Zulip is designed to store locally echoed message content in local
 storage and replay it when your browser reconnects to the Internet.
 This should ensure that messages that users thought they had sent get

templates/zerver/help/view-the-exact-time-a-message-was-sent.md

@@ -1,12 +1,8 @@
 # View the exact time a message was sent
 
-To see the exact time that a particular message was sent, look for the
-message's timestamp located on the right-hand side of the message's
-content.
+To see the exact time a message was received by the Zulip server, hover over
+the timestamp to the right of the message.
 
-![Message timestamp](/static/images/help/message-exact-time.png)
+## Related articles
 
-!!! tip ""
-    Depending on your settings, the message's timestamp is displayed in
-    either a 12-hour or 24-hour format; to change the format your messages
-    are displayed in, see [here](/help/change-the-time-format).
+* [Use 24-hour time](/help/change-the-time-format)