In my GNOME locale settings, the preview shows that dates are in the format YYYY-MM-DD and that times are separated by colons. However, in Thunderbird, these formats aren’t respected. I’ve scoured the Web, and there doesn’t seem to be a way to tell Thunderbird how to format things directly. You have to use the locale settings to do it. But Thunderbird also isn’t respecting the locale settings. I’ve also tried building custom locales, but neither GNOME nor Thunderbird seems to see them after I compile the new locales, even though command line tools do see them. Any ideas on how to get the dates and times formatted as desired in Thunderbird?
GNOME locale settings:
Dates and times in Thunderbird: