Am and pm are latin, ante/post meridiem.
In application AM is from 12 midnight to 11.59 before noon and pm is from 12 noon to 11.59 before midnight
post meridian and ante meridian
Midnight to noon is 12 hours (AM), noon to midnight is another 12 hours (PM). Therefore, it is 12 hours from PM to AM.
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!)
it is pm. when it gets to noon, it is pm
12 pm, 1 pm, 2 pm, 3 pm, 4 pm, 5 pm, 6 pm, 7 pm, 8 pm. 8 hours.
it is 9127 PM EDT = 5 PM CST7 PM EDT = 6 PM CDT7 PM EST = 6 PM CST7 PM EST = 7 PM CDT
Midnight is am and (obviously) noon is pm
12.45 pm
8 PM PST is 9 PM MST and 10 PM MDT.8 PM PDT is 8 PM MST and 9 PM MDT.
pm
pm
1205 pm is afternoon
1:30 PM.