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Independence Day. Labor Day. Columbus Day. Veterans Day. Thanksgiving Day. Christmas Day. National holidays in the United States are 11 calendar dates designated by the U.S. federal government as official holidays. On these days non-essential national offices are closed although the employees receive pay. [1]
These include New Year's Day, Memorial Day, Independence Day, Labor Day, Thanksgiving, and Christmas. Businesses often close or grant paid time off for New Year's Eve, Christmas Eve, and the Day after Thanksgiving, but none of these are federal holidays. Other federal holidays are less widely observed by business.
The Islamic calendar is based on the synodic period of the Moon's revolution around the Earth, approximately 29 1 ⁄ 2 days. The Islamic calendar alternates months of 29 and 30 days (which begin with the new moon). Twelve of these months make up an Islamic year, which is 11 days shorter than the Gregorian year. Some Gregorian dates may vary ...
The date of 13.0.0.0.0 4 Ahau 3 Kʼankʼin is usually correlated as 21 or 23 December 2012. The 2012 phenomenon was a range of eschatological beliefs that cataclysmic or transformative events would occur on or around 21 December 2012.
February 30 or 30 February is a date that does not occur on the Gregorian calendar, where the month of February contains only 28 days, or 29 days in a leap year. However, from a historical perspective February 30 has been used at least once and appears in some reform calendars . The thirteenth-century scholar Johannes de Sacrobosco claimed that ...
The pattern of seven-day weeks repeats over a two-year cycle, i.e., the calendar year always begins on a Sunday in odd-numbered years, thus effecting a perpetual calendar for Mars. Whereas previous proposals for a Martian calendar had not included an epoch, American astronomer I. M. Levitt developed a more complete system in 1954.
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