Solution: I found this this bugzilla comment which links to this page for time formatting. I changed intl.date_time.pattern_override.time_short to h:mm a so it shows 4:26PM. There's an open bugzilla report for my issue: Date not formatted according to user's locale (LC_TIME).
For instance, 4:26PM instead of 16:26, I'm on linux (NixOS) if that helps.
Why would u want to use the objectively worse time format?
U need to set the time format steing. No idea what's its called or where to put it but it will exist somewhere
I edited the post to include the solution, have a look.