AM or PM?

Joe. My. God.: "9:05AM - I think the party is just about peaking right now. It seems like some people are still arriving, judging by the coat check lines, but it seems like people are starting to leave judging by the naked people in the coat check lines. In the bathroom, somebody asks, 'Hey, anybody know what time it is?' From inside a stall comes, 'It's 9 o'clock on the Lord's Day.' The first guy says, 'AM or PM?' Ha ha ha ha. Oldest Black Party joke ever."