Originally Posted by
cperciva
I'm pretty sure that this must be possible in some of their systems. If a flight scheduled to depart at 23:55 leaves 10 minutes late, it keeps the same flight number; but if it goes mechanical and leaves 10 hours late, it gets renumbered because they "can't have two different flights using the same number on the same day". So I must conclude that somewhere between 00:05 and 09:55 lies the start of a "new day".
For flight ops purposes yes; for flight booking purposes probably no. I do not think you can do a SDC to a later flight that is scheduled to depart after midnight without significant level of human intervention (I.e. supervision overrides) under normal circumstances. I'm saying this based on personal experience and other first hand accounts that I have come across.