For example, the moment of midnight occurs precisely 12 hours after noon on the previous day and 12 hours before noon on the following day | Although the precise moment of noon falls in neither category, the hour succeeding it, from 12:00:01 to 12:59:59, is clearly after noon |
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Ante meridiem is commonly denoted as AM, am, a | One account suggests that this custom evolved because the Egyptians commonly used the base 12, counting the 3 joints in their fingers, not including the thumb |
From 1:00 to 11:59, just add am after the time.
30The Egyptians are thought to be responsible for dividing the day into 24 equal parts | Etymology 2 [ ] This is missing or incomplete |
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From 12:00 to 12:59, just add pm after the time | Midnight and Noon: AM or PM? It runs from midnight to noon |
com uses am and pm, but the other variants are equally correct and widely used.
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