why is 12pm called noon?
601700
Originally Answered: Why do we call 12 p.m. noon? The term 'noon' comes from the Old English 'non', which in turn is derived from the Latin 'nona hora' -ninth hour. Originally it referred to the ninth hour after sunrise - that is, 3pm. During the twelfth century, the meaning began to shift from 3pm to midday.
1002734
12:01 AM is one minute after midnight. The way to remember this is that AM = “ante meridiem” which means “before midday”, and PM = “post meridiem” which means “after midday”. ... Since noon is neither AM nor PM, we shouldn't technically call it “12:00 PM”, but rather “12:00 noon”.
1217028
E. G. Richards in his book Mapping Time provided a diagram in which 12 a.m. means noon and 12 p.m. means midnight. ... For an example of the latter method, "midnight" is replaced with "11:59 p.m." for the end of a day or "12:01 a.m." for the start of a day.
14019
Midnight is exactly 180 degrees apart from noon because the earth is round in the network of geographical coordinates the meridian of Greenwich indicated 12:00 noon Any point on the surface of planet earth at 180 degrees of the meridian of Greenwich or "0" is marking midnight this means that it is neither am nor pm.
826022
AM = Ante meridiem: Before noon. PM = Post meridiem: After noon.
969741
To avoid confusion, it is always better to use the 24-hour clock, so that 12:00 is 12 noon. Therefore 24:00 Sunday or 00:00 Monday are both midnight meaning Sunday to Monday. It is common for transport timetables to use 23:59 Sunday or 00:01 Monday, or 11:59 pm or 12:01 am, to further reduce confusion.
690426
The first 12-hour period is designated as am. It runs from midnight to noon. The second period, marked pm, covers the 12 hours from noon to midnight. ... PM = Post meridiem: After noon.
220534
Since noon is neither before nor after noon, and midnight could be considered the end of one day or the start of the next, neither label fits. However, it's a very common interpretation that 12:00AM means midnight (00:00 in 24-hour notation) and 12:00PM means noon (12:00 in 24-hour notation).
564697
12:00 pm is 12 noon, while 12 midnight is 12 am! It is neither of the two. If you want to avoid the common ambiguity and confusion that is the source of this question, be explicit and say 12:00 noon or 12:00 midnight. Noon is usually 12 pm, simply by convention.
202547
There are no standards established for the meaning of 12 a.m. and 12 p.m. It is often said that 12 a.m. Monday is midnight on Monday morning and 12 p.m. is mid-day.
711619
One refers to the clock and one refers to the sky. The set of words that refers to the clock is: midnight (exactly 12:00 am), morning (from 12:01 am to 11:59 am), noon (exactly 12:00 pm), afternoon (from 12:01 pm to 6:00 pm), evening (from 6:00 pm to 11:59 pm).
1132603
Midnight (12:00 a.m.) — 0000 hrs. 1:00 a.m. — 0100 hrs. 2:00 a.m. — 0200 hrs.
731054
By convention, 12 am refers to midnight at the start of the specified day (00:00 on the 24 hour clock) and 12 pm to midnight at the end of that day (24:00 on the 24 hour clock).
14204
Using numbers from 1 to 12, followed by am or pm, the 12-hour clock system identifies all 24 hours of the day. For example, 5 am is early in the morning, and 5 pm is late in the afternoon; 1 am is one hour after midnight, while 11 pm is one hour before midnight.
1091335
While midnight or 12 AM is rendered as 2400 on the military time chart, 12:01 AM is actually 0001 in military time.
182665
If you are trying to say "It is 12:00": Son las doce. Son las doce del mediodía. It is twelve oclock midday.
236265
Both 12am and 12pm are precise moments of time. 12am is the exact moment the 12th hour of the morning finishes (am), and similarly for pm. Therefor 12am is midday and pm would start straight after. The confusion has started since the invention of the digital clock.