It is exactly three forty-seven in the morning when the Potters get the most unexpected of knocks on their door. Sirius/James. Sort of.

They shave your head, first thing when you get there. A lot of people don't really think about that. That was more of a Muggle tradition, people thought, if at all. It's just the long-timers, and they never really give an explanation why.

Sirius Black knows what today is. Which -- that's stupid, of course he knows what today is, everyone knows what today is.