Ok, there is a precise moment, 10 seconds to midnight....
so it isn't midnight until 10 seconds after the ball is dropped. Your logic is twisted. the Ball has a specified time to start to drop as was the time of Christ's birth. It wasn't midnight until after those 10 second. Jospeh didn't have sex until after the birth.
You can't have any desert, unitl you finish your dinner...
Ugh, disregard. That was a terrible analogy on my part.