What does am mean?

The full English name of AM is "ante meridiem", which usually appears in the 12-hour clock and refers to before noon of the day, that is, before 12 o'clock. For example, the time "9:00 ante meridiem" means morning. 9:00”.

AM, (abbreviation of ante meridiem) usually appears in the 12-hour format, referring to noon (before 12 o'clock) of the day, such as 9:00 ante meridiem means 9:00 in the morning.

AM (abbreviation of ante meridiem) usually appears in the 12-hour format and refers to the pre-noon time of the day (before 12 o'clock, that is, 0:00:00~11:59:59), such as 9:10 ante meridiem. means 9:10 in the morning, 3:00 ante meridiem means 3:00 in the morning, 12:00 ante meridiem means 12 o'clock in the middle of the night (midnight).

corresponds to PM (abbreviation of post meridiem), which refers to the afternoon of the day (after 12 o'clock, that is, 12:00:00～23:59:59), such as 4:50 post meridiem means 4:50 p.m., 11:00 post meridiem means 11:00 late at night, and 12:00 p.m. means 12 noon (midday).

Note: AM and PM can be used in both English and Latin, and often appear after the digital time. There are two formats for expressing time with numbers in English. For example, 8:30 in English can be expressed as 8:30 or 8:30. The former is universal, the latter is the traditional British notation.

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