The 12-hour clock is a time convention in which the 24 hours of the day are divided into two periods: a.m. (from the Latin ante meridiem, meaning "before midday") and p.m. (post meridiem, "after midday"). Each period consists of 12 hours numbered: 12 (acting as zero), 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, and 11.
The 12-hour clock was developed over time from the mid-second millennium BC to the 16th century AD.
Read more about 12-hour Clock: History and Use, Abbreviations, Confusion At Noon and Midnight
Famous quotes containing the word clock:
“Up the reputable walks of old established trees
They stalk, children of the nouveaux riches; chimes
Of the tall Clock Tower drench their heads in blessing:
“I don’t wanna play at your house;
I don’t like you any more.”
My house stands opposite, on the other hill,”
—William Dewitt Snodgrass (b. 1926)