@0xabad1dea people who are born on the 29th of Feb are gonna love it! /s
Edit/More stuff: I just wanted to add that the first thing we were taught when we learned java in uni was date validation especially for leap years, iirc it was year%5 == 0 I think
But I like to think that the code was all if statements or perhaps a huge switch with tens of cases, and that's why you always use libraries and never do things yourself, but I'll fricking do it anyways kekw :btr_bocchi_panic: