Description of problem: Hello! I found that SDDM does not correspond to the correct time settings. I am using the 24-hour format and on login/logout I have noticed that SDDM shows the time in 12-hour format (AM/PM). Steps to Reproduce: 1. Set the time format to 24-hours 2. Logout. 3. Login again.
Set time format in your user session? I believe that is only for the user, and I don't think sddm themes support configuring the time format display (short of your making a custom theme that matches your own preference)