Great stuff!

Headed DTW - Miami on a Thursday 9:00 flight. Me & Mrs. jojojo, on two separate tickets. She's staying only about 24 hours. Try to check in Thursday at 8:58, no dice. 9:00 - still too early. 9:01, ditto. Maybe clocks are off. 9:04. 9:06. 9:08 - the web site keeps telling me "you [idiot] can't check in until 24 hours before your flight."

And then the light bulb goes off. You see, 9:00 can actually refer to two different times, 12 hours apart. 8*) And the moral is that if you want the 9AM flight, it is very, very important not to book the 9PM one.