26.21 Thunderbird Date Format

20241221

The dates for email was being shown as MM/dd/yyyy. I prefer EEE yyyy-MM-dd as in Tue 2024-12-17. To change the format use the Config Editor at the bottom of the Settings page.

  1. Go to Edit → Preferences → Advanced → General → Config Editor
  2. Search for “intl.date_time.pattern_override.date_short”
  3. Add a new string preference with this name
  4. Set the value to your desired date format, for example “EEE yyyy-MM-dd”

After restarting Thunderbird the date/time column will change to this format.


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