1) Post Meridiem
2) Prime Minister
3) Power Management
4) Perpetual Motion
antemeridian is AM; postmeridian is PM.
AM: Ante Meridiem; PM: Post Meridiem
post meridem
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Am = Ante meridian and Pm = post meridian
The acronym PM can mean post meridian, which is the time from noon until midnight, or it can mean prime minister.
AM is ante meridian - After 12Midnight and before 12 Noon. PM is post meridian - After 12 Noon and Before 12 Midnight.
Anti-Meridiem meaning before midday PM is Post-Meridiem meaning after midday
Ante Meridian Latin = "before midday" Post Meridian Latin = "after midday"
From 5 PM to 9:30 PM, there are 4 hours and 30 minutes. This includes the full 4 hours from 5 PM to 9 PM, plus an additional 30 minutes to reach 9:30 PM.
When saying AM or PM there are pauses between each letter. AM refers to morning and PM to the evening.
Midnight to Noon is AM. Noon to midnight is PM.