I have latest Thunderbird version (115.9.0 64bit) on fully patched Ubuntu 22.04.4 LTS. I'm trying to get it to display Day-of-Week for old messages - is this possible? I have tried all sorts of combination as detailed [http://kb.mozillazine.org/Date_display_format HERE] to no avail. I'd like concise instructions on how to do this (if it can be done). I do not believe trying a new profile will work as I need to test this for old messages - at least for messages older than a week. From the link above, I can the Day-of-Week to work for the current week - but that only displays the day and time. What I'm after is as shown in the attached Outlook screenshot. Also see the closest I can get that to match in the Thunderbird screenshot.