12-hour clock

The 12-hour clock is a method of telling the time in which the civil day runs from midnight until next midnight.

 AM (ante meridiem) = midnight until midday.
 PM (post meridiem) = midday until midnight.

The following numbers (used twice in the same civil day) of hours are: 12, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10 and 11, with AM or PM.

Both names are from Latin and , means "before midday" and  means "after midday".


The 12-hour time is common in several English-speaking countries and former British colonies (such as the United Kingdom, the United States of America, the English speaking parts of Canada or India), as well as a few other countries. There is no widely accepted convention for how midday and midnight should be represented: in English-speaking countries, "12:00 PM" means 12 o'clock noon, while "12:00 AM" means 12 o'clock midnight.

 24-hour clock  12-hour clock  Period of the day 00:00  12:00 AMmidnight  PostmidnightOvernight 01:00  1:00 AM 02:00  2:00 AM 03:00  3:00 AM 04:00  4:00 AM 05:00  5:00 AM 06:00  6:00 AM  Morning 07:00  7:00 AM 08:00  8:00 AM 09:00  9:00 AM 10:00  10:00 AM 11:00  11:00 AM 12:00  12:00 PMnoonmidday  Afternoon 13:00  1:00 PM 14:00  2:00 PM 15:00  3:00 PM 16:00  4:00 PM 17:00  5:00 PM 18:00  6:00 PM  Evening 19:00  7:00 PM 20:00  8:00 PM 21:00  9:00 PM 22:00  10:00 PM 23:00  11:00 PM

 References 

Related pages
24-hour clock
Clock
Time

Category:Time
Category:Clocks