Date/time not following system locale

[skibbipl]

🐞 Describe the bug
I'm using polish locale, but date/time of messages in webui is american. I have 12h clock and MM/dd/YY.

💻 Components impacted
Web server

💡 Screenshots and/or logs

🔮 Additional context
Date/time format should follow system locale or be configurable. I'm using latest ntfy.