Definition of "civil day" []

• The mean solar day, used in the ordinary reckoning of time, and among most modern nations beginning at mean midnight; its hours are usually numbered in two series, each from 1 to 12. This is the period recognized by courts as constituting a day. The Babylonians and Hindoos began their day at sunrise, the Athenians and Jews at sunset, the ancient Egyptians and Romans at midnight. (noun)

Gnu Collaboartive International Dictionary of English: licensed under The Code Project Open License (CPOL)