Hello,
How do I change the clock from 12 hour to 24 hour?
Assuming you’re using KDE Plasma?
Right click on the time in the bottom right corner:
Select the “Time display” option:
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Thank you!
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If you want 24 hour clock, ISO date (2024-11-22T14:00:01+01:00) and English, you can also set your regional settings to en_DK.UTF-8.
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@emk2203 Thank you. Is there a way to edit a Time Format definition? The solution provided by @Bink is fine for changing the displayed time, but does not work for apps that depend on Regional Settings. Using DK also changes the date format and I want to preserve the USA one “mm/dd/yy”.
en_BI.UTF-8 worked. @emk2203 thanks for the idea.
After changing to en_BI.UTF-8 another app is not happy:
Is there a way to edit the Default for American English?
If you edit the default, it’s not the default anymore. 
Seriously, I tried this myself some years ago, and there’s always some issue coming like you describe here. You plug one hole, open another. It’s frustrating. Best to settle upon a recognized locale. en_US.UTF-8 clearly has most support, but for non-US people, it’s not the right choice.
You can try with LC_TIME=C.UTF-8 for 24-hour format, but there’s most likely some program which won’t like it.
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OK, makes sense. I’ll live with the smallest issue; the 12 hour time format.
Thanks!
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