Hint is here :) https://txt.fyi/-/20336/e86ca3bf/
and when I wrote this comment, something occurred to me about it and I tried it and got in. Rubber ducky ftw.
Frustrated, I just entered 0000!
Similar to a TODO comment... it just never got done.
Also took me a while to figure out the calendar zoomed in because it didn't work the first few times
Is there a way of finding out the format in the game? I would never have tried that