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The American Heritage Dictionary of the English Language states "By convention, 12 AM denotes midnight and 12 PM denotes noon. Because of the potential for confusion, it is advisable to use 12 noon and 12 midnight". [34] E. G. Richards in his book Mapping Time (1999) provided a diagram in which 12 a.m. means noon and 12 p.m. means midnight. [35]
Noon (also known as noontime or midday) is 12 o'clock in the daytime. It is written as 12 noon, 12:00 m. (for meridiem, literally 12:00 midday), 12 p.m. (for post meridiem, literally "after midday"), 12 pm, or 12:00 (using a 24-hour clock) or 1200 (military time). Solar noon is the time when the Sun appears to contact the local celestial meridian.
In the Pacific Time Zone (from December 1975 to March 1977), ABC's lineup had its game shows aired in the morning, while the 12 Noon to 3 PM block featured The Edge of Night, Ryan's Hope, All My Children, One Life to Live, and General Hospital in succession. After April 1977, ABC's Pacific Time Zone daytime schedule began matching that of its ...
7:00 am 7:30 am 8:00 am 8:30 am 9:00 am 9:30 am 10:00 am 10:30 am 11:00 am 11:30 am noon 12:30 pm 1:00 pm 1:30 pm 2:00 pm 2:30 pm 3:00 pm 3:30 pm 4:00 pm 4:30 pm 5:00 pm 5:30 pm 6:00 pm 6:30 pm ABC Fall local programming Linus the Lionhearted In C O L O R: Beany and Cecil (R) The Peter Potamus Show (R) The Bullwinkle Show (R) Discovery In C O L ...
The English term noon is also derived from the ninth hour. This was a period of prayer initially held at three in the afternoon but eventually moved back to midday for unknown reasons. [12] The change of meaning was complete by around 1300. [13] The terms a.m. and p.m. are still used in the 12-hour clock, as opposed to the 24-hour clock.
Though there is no global unanimity on the issue, most often midnight is considered the start of a new day and is associated with the hour 00:00. Strictly speaking, it is incorrect to use "a.m." and "p.m." when referring to noon or midnight. The abbreviation a.m. stands for ante meridiem or before noon, and p.m. stands for post meridiem or ...
In these cases, exact and unambiguous communication of time is critical. If someone mistakes 5:00 AM for 5:00 PM in a hospital for example, when medication or other medical treatment is needed at a certain time, the outcome could be dire. Thus 24-hour time (5:00 PM written as 17:00) is used.
12 o'clock usually refers the time as shown on a 12-hour clock, either noon - 12 o'clock at daytime - or midnight - 12 o'clock at nighttime. 12 o'clock may also refer to: 12-hour clock, a time convention in which the 24 hours of the day are divided into two periods Noon, 12 o'clock in the daytime, as opposed to midnight