The description for the Rep Cap hat says that to get it I need to "Hit the reputation cap (200 in one day)".
I hit 207 yesterday, with 30 of that being for accepted answers and 2 for an answer I accepted on one of my questions, and the UTC day rolled over 6 hours ago, but I still don't have the hat.
I'd guessed that the rep check for this hat would be similar to the Mortarboard and Legendary badges, so the +2 for accepting an answer wouldn't count towards it, but +15 for each accepted answer would. Is that right?
If yes, why am I missing a hat? If no, what are the actual requirements? (And the hat description might need an update in the latter case.)