fix incorrect timezone parsing

All the shown datetimes in the app are parsed to the incorrect time, and showing one hour too early. This is happening in my timezone (in Amsterdam) and might have something to do with DST, I absolutely suck at coding with timezones so that might not be the exact problem, this code however fixes it.

This is the first Python I've ever written so if there's anything weird in here please do let me know. Also I'm not sure if throwing in another dependency is the way to go here, but I've been browsing around and have seen a lot of people struggling with doing this, and this seemed like the easy fix.