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On https://slack.com/, how do I display message timestamps in 24-hour format instead of AM/PM?

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  • 3
    See the support page for slack that shows exactly how.
    – user144900
    Feb 28, 2017 at 4:09
  • @GypsySpellweaver bam there's the answer. don't know how I missed it, thanks! Feb 28, 2017 at 4:32
  • Hated to actually copy paste that into an answer :->
    – user144900
    Feb 28, 2017 at 4:48
  • @Gypsy: You should anyway. This allows for the Asker to mark it as accepted, which acts as a signpost to future readers looking for the same solution. I've added a Community Wiki answer, but if you'd like to add your own please feel free to do so and I'll delete mine.
    – ale
    Feb 28, 2017 at 13:53

1 Answer 1

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From Slack support:

  1. Click your team name to open the Team Menu.
  2. Choose Preferences.
  3. Select the Messages & Media tab.
  4. Check out the Message Theme and Display Options settings.

You can adjust other message-related settings under Display Options:

...

  • Show times with 24-hour clock
    Choose between 24-hour and 12-hour times (e.g. 16:12 or 4:12 PM).
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  • It works. However slackbot still uses 12-hour clock.
    – galcyurio
    Sep 5, 2019 at 2:25
  • 1
    setting this option only half works. I still see "Call Ended Ended at 3:56 PM - Lasted 10 minutes"
    – Marc
    Sep 24, 2020 at 14:06
  • Surprising that this menu is not reached by clicking the Menu icon, the three lines in the top left corner
    – Roland
    Nov 8, 2022 at 8:01
  • 6
    How is that setting not in the "Language & Region" tab?
    – ofhouse
    Nov 9, 2022 at 13:31

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