Noon is PM, midnight is AM.
Midnight to Noon is AM. Noon to midnight is PM.
It's neither, 12 noon and 12 midnight are just that although there are a lot of illiterates in positions where they should know better!)
PM begins at 12 (noon) 12 noon
it is pm. when it gets to noon, it is pm
12 pm is noon, 12 am is midnight
The afternoon is AFTER noon, so pm.
am and pm change at 12:00 noon. before 12:00 noon is am. at 12:00 it is noon. after 12:00 noon it is pm.
1 PM EST = noon CST
Noon time is 12 pm
Ante Meridian: before noon - am Post Meridian: after noon - pm