On 2019-11-22 09:18, Bob Goodwin wrote: > However after rebooting the computer Thunderbird time is still displayed in the 12 hour AM/PM format on this > f-31 computer. FWIW, I'm just "testing" at the moment. I edited /usr/bin/thunderbird to add at the very beginning export LC_TIME=C I then found that in the T-Bird preferences you need to check the box in Advanced--->Date and Time Formatting Regional settings locale: und Don't have the "Application locale" box checked. -- The key to getting good answers is to ask good questions. _______________________________________________ users mailing list -- users@xxxxxxxxxxxxxxxxxxxxxxx To unsubscribe send an email to users-leave@xxxxxxxxxxxxxxxxxxxxxxx Fedora Code of Conduct: https://docs.fedoraproject.org/en-US/project/code-of-conduct/ List Guidelines: https://fedoraproject.org/wiki/Mailing_list_guidelines List Archives: https://lists.fedoraproject.org/archives/list/users@xxxxxxxxxxxxxxxxxxxxxxx