Comment 1 for bug 231936

I am experiencing the same issue.

- My time format is set to 12-hour format.
- I have locations in both 12-hour and 24-hour default formats
- When I first open the drop-down the times display in their default formats
- After a minute they switch to 12-hour format

Expected behavior:

format should be the same as your preference 12 or 24-hour.

A better solution would be to have a second preference for locations that determines if the clock should use your preferred hour format for all locations (rather than just your local time) or use the location default.