I switched permanently to 24hr notation after my buddy asked me to pick him up from the airport at "one-o'clock on Thursday". No problem, I didn't have any classes Thursday afternoon, so "see you then". You see where this is going? At 0-dark-thirty I get a call: "dude, where are you?" Yeah. I still give him shit about it, thirty years later.

24hr time, folks. 24hr time.