A date in a calendar is a reference to a particular day represented within a calendar system. The calendar date allows the specific day to be identified. The number of days between two dates may be calculated. For example, "24 December 2012" is ten days after "14 December 2012" in the Gregorian calendar. The date of a particular event depends on the observed time zone. For example the air attack on Pearl Harbor that began at 7:48 a.m. Hawaiian time on December 7, 1941 took place at 3:18 a.m. December 8 in Japan (Japan Standard Time).
A particular day may be represented by a different date in another calendar as in the Gregorian calendar and the Julian calendar, which have been used simultaneously in different places. In most calendar systems, the date consists of three parts: the day of month, month, and the year. There may also be additional parts, such as the day of week. Years are usually counted from a particular starting point, usually called the epoch, with era referring to the particular period of time (Note the different use of the terms in geology).
The most widely used epoch is a conventional birthdate of Jesus (which was established by Dionysius Exiguus in the sixth century). A date without the year part may also be referred to as a date or calendar date (such as "17 December" rather than "17 December 2012"). As such, it defines the day of an annual event, such as a birthday or Christmas on 25 December.
Many computer systems internally store points in time in Unix time format or some other System time format. The date (Unix) command -- internally using the C date and time functions -- can be used to convert that internal representation of a point in time to most of the date representations shown here.
Other articles related to "month day, months, days, month":
... In the United States, the usual written form is December 7, 1941, spoken as "December seventh, nineteen forty-one" or colloquially "December the seventh, nineteen forty-one" ... Ordinal numerals, however, are not always used when writing and pronouncing dates, and "December seven, nineteen forty-one" is also an accepted pronunciation of the date written December 7, 1941 ...
... The months were either 29 or 30 days in length, loosely in alternation, since the moon orbits the earth in roughly 29.5 days ... than following a set scheme (along the lines of "Thirty days has September..."), the duration of each month was declared just before month's end in an attempt to latch the ... The short months of 29 days were known as "hollow" and those with 30 days as "full" ...
Famous quotes containing the words day and/or month:
Man runs his course;
A brand, or flaming breath,
Comes to destroy
All those antinomies
Of day and night....”
—William Butler Yeats (18651939)
“The first month of his absence
I was numb and sick
And where hed left his promise
Life did not turn or kick.
The seed, the seed of love was sick.”
—Alun Lewis (19151944)