A.m. and p.m. - what does that mean? Is noon 12 a.m. or 12 p.m.?

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The meaning of a.m. and p.m.

The abbreviations come from Latin and mean:

A.m. – ante meridian – before noon

p.m. – post meridian – afternoon

Germany uses the 24-hour system. In countries like Canada, the USA, and other English-speaking countries, the 12-hour system.

The day is divided into two halves of 12 hours each.

a.m. stands for the period from midnight to morning and p.m. for the afternoon.

a.m.: midnight (0:00) to noon (12:00)

p.m.: noon to midnight (24:00)

These statistics show that the analog or digital display is a decisive criterion when buying a wristwatch.

An analog display eliminates annoying conversions from the 24 to 12-hour system.

The alphabet: In the German alphabet, the letter p comes after a. So p.m. is behind in time.

You also remember AM like this: AM stands for “morning” and thus for the period from 00:00 to 12:00.

PM can be remembered by thinking of PM = Past Midday (afternoon).

While most countries prefer the 24-hour format, in English-speaking countries and Latin America, the 12-hour format is the most common, twice a day at midnight and midday.
To differentiate, an am (ante meridian, Latin for before noon, morning) or a pm (post meridian, Latin for the afternoon) is added.
The 12-hour format starts at midnight at 12:00 a.m., one hour later, it is 1:00 a.m.
12:00 p.m. is noon, followed by 1:00 p.m., and the last minute of the day is at 11:59 p.m. There is no 0:00.
In the 24-hour format, the day starts at midnight, noon is noon, and the day ends at 11:59 p.m. There is no midnight.

Noon and midnight are cases where logically, the time and time do not stick to what they mean, e.g., Ante Meridian and Post Meridian.
As suggested in other replies, 12 p.m. and 12 pm-midnight are used to avoid confusion.
However, the convention is that midnight means noon after 23:59:59, so the day starts in the morning.
In other words, the date on the calendar changes at midnight, and that time is midnight.
We can use a different system like that used in the military, the 24-hour clock.
The beginning of the day (noon or midnight) is indicated as 0000 and ends at 2359 (corresponds to 23:59).
So the hour after noon is indicated by numbers from which we subtract 1200 to get the hour based on 12 hours.
Note: for times between 12:00 and 13:00 (except 13:00)
With the 24 hour time, 1200 does not need to be subtracted to get the 12 hour time. From 12:00 to 1:00 (except 1:00), we need to add 12 hours to change from 24-hour clock to 12-hour clock.
It isn’t effortless, but that’s the way it is.
Remembering the calendar thing can help, e.g., H. The date changes, and the day starts. So 12 is midnight.

AM is the acronym of Ante Meridian, which means before noon and indicates any time between midnight and one second before noon.
PM is the acronym for Post Meridian, which means afternoon and indicates any time between noon and one second before midnight.

The opposite word indicates the remaining hours of the day and is Ante meridian.
This expression is used in the Anglo-Saxon states to tell the time.
With the clarification that the 12: 00 PM are the noon while 12: 00 AM are the midnight.

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