So if I wrote you a note asking you to meet me at 00.00 would you arrive during the day or during the night?
NB: No wisecracks about not wanting to meet me at any time please.
I wouldn't want to meet you at any time.If you were operating on a 24 hour clock it would be during the night; if you were operating on a 12 hour clock it would be an evens shot apart from any factors I could deduce about whether you would prefer to meet me at midday or midnight.
That's all irrelevant anyway, 12:30 should be 00:30; I can see no logical argument against this. At best it's an antiquated reflection of analogue watches/clocks with the number 12 at the north pole.