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Thunderbird shows time in a.m./p.m. format since recently

  • 4 replies
  • 0 have this problem
  • Last reply by E.Q.

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I use Thunderbird 128.5.2 on Linux. I have set it to use my regional settings (i.e., locale). That meant, because I have set LC_TIME="nl_NL.UTF-8", that time was in 24-hour format (in the date column of the message list and in the message header). Recently, it switched to a 12-hour a.m./p.m. format (e.g., 07-01-2025 1:47 p.m. instead of something with 13:47). How do I get it to use a 24-hour format again?

I do not want to fiddle with datetime formatting settings. I just want my locale settings to be used. If it turns out locale settings have changed, I need to fix those. (I do not think so, on the command line, the date command returns do 9 jan 2025 19:33:33 CET, something in 24-hour format.)

I use Thunderbird 128.5.2 on Linux. I have set it to use my regional settings (i.e., locale). That meant, because I have set LC_TIME="nl_NL.UTF-8", that time was in 24-hour format (in the date column of the message list and in the message header). Recently, it switched to a 12-hour a.m./p.m. format (e.g., 07-01-2025 1:47 p.m. instead of something with 13:47). How do I get it to use a 24-hour format again? I do not want to fiddle with datetime formatting settings. I just want my locale settings to be used. If it turns out locale settings have changed, I need to fix those. (I do not think so, on the command line, the date command returns do 9 jan 2025 19:33:33 CET, something in 24-hour format.)

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I use Windows so can't definitively help. In Windows there's a setting within the OS that affects all apps unless manually over-ridden. If you have one in Linux, I'd check that.

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frisée said

[…] In Windows there's a setting within the OS that affects all apps unless manually over-ridden. If you have one in Linux, I'd check that.

I have done so, it is the so-called ‘locale’. That seems to be set correctly.

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'Locale' is a setting in Thunderbird. It's called the same in the Linux Operating System? Just checking...

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frisée said

'Locale' is a setting in Thunderbird. It's called the same in the Linux Operating System? Just checking...

Yes.

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