16 Sep
2019
16 Sep
'19
8:03 a.m.
Hi Dan,
Also, this page may be of help. http://kb.mozillazine.org/Change_the_Date_Format#Configuring_the_date.2Ftime...
According to RFC 2822, the time of day in an email message is always in 24-hour format.
That's correct.
Changing your system settings can't and won't (and IMO shouldn't) change that. If anything, I think that you'll have to change something in Thunderbird.
There could be a setting in Thunderbird, but Thunderbird could, and does according to that URL, make use of its environment through the locale's time preferences, and that's what locale(1) shows. So the correct place to change this isn't necessary Thunderbird. -- Cheers, Ralph.