6-12PM, haha.
My rink is pretty cool, though, at least for Friday night sessions, I've managed to get LONG practice times in the Friday night public sessions. It's supposed to be from 7-8:30, but oddly enough not too many people usually go to Friday nights, especially during the summer and fall, winter is a bit different, though. But what happens that's really cool, though, is a lot of times Friday nights they'll just go over. Quite recently I got to skate 'til about 9:15, as there was a hockey game on the rink downstairs, so that means over 2 hours ice time. Another time I skated until 9:45, as two higher level figure skaters that worked there decided to skate, and use the jump harness, so they had half the ice, and I had half. Not bad at all. Another time on the 4th of July, there was NOBODY there except me, so I had the ice all to myself for an hour and a half, or possibly they even let it run to 8:45.
But yeah, night time is when I find I can skate best, I usually have more calories in me then compared to morning/noon time, and I just skate much better.