Thunderbird Betterbird force proper date format

They insist on having month/day/year which is silly. Setting the pref to use the system format doesn’t work. The prefs about:config thing has no way to add a setting even though it says it does, so just edit the file itself.

What to do:

  1. Close Betterbird completely
  2. Go to profile folder (Help > Troubleshooting Information > Open Directory)
  3. Create a new text file in that folder called user.js
  4. Open user.js in a text editor and paste this:

javascript

// Override date format to DD/MM/YYYY
user_pref("intl.date_time.pattern_override.date_short", "dd/MM/yyyy");
user_pref("intl.date_time.pattern_override.date_medium", "dd MMM yyyy");
user_pref("intl.date_time.pattern_override.date_long", "dd MMMM yyyy");
  1. Save the file and restart Betterbird