OK, who is down voting me for saying 12pm is midnight? Everyone known that 12 hours past meridian is midnight (+ or - daylight savings).
12 hours POST MERIDIAN. Meridian is MID DAY, when the sun is directly overhead.
12 hours ANTE MERIDIAN is 12 hours BEFORE midday, so it HAS to be midnight.
And when you DO start thinking about daylight savings, the fact that the solar meridian changes by an hour or two or a half in some places...
Oh I give up. Time is an illusion. 6 pints please, the world's about to end.