So I'm wondering how I'm getting a date that, according to the settings should not be that one in that case, but is pretty fucking close (so much so that I first thought that was the correct one).
Then I realise it's because I'm hitting a case where I can't get all the necessary info so I literally made a method called GuessDate and it tries to guess the date based on available info and it did an amazing job, but it didn't have all the data so it's slightly off.
I both love and hate programming right now :)