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Dates and Calendars: Difference between revisions
→Gregorian Calendar
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==Gregorian Calendar== | ==Gregorian Calendar== | ||
The Gregorian calendar is the accepted international standard calendar, and is used in almost every country for civil and administrative purposes. It is a solar calendar, meaning that it is based on the Earth's revolution around the Sun. The Gregorian calendar is | The Gregorian calendar is the accepted international standard calendar, and is used in almost every country for civil and administrative purposes. It is a solar calendar, meaning that it is based on the Earth's revolution around the Sun. The Gregorian calendar is updated regularly as needed by the IERS. The International Earth Rotation and Reference Systems Service (IERS) is responsible for making sure that the calendar stays in sync with the Earth's rotation. | ||
<bR> | <bR> | ||
The Gregorian calendar is used for both religious and secular purposes. It is the official calendar of the Catholic Church, and it is also used by most governments and businesses around the world. The calendar is also used to determine the dates of holidays and other important events. | The Gregorian calendar is used for both religious and secular purposes. It is the official calendar of the Catholic Church, and it is also used by most governments and businesses around the world. The calendar is also used to determine the dates of holidays and other important events. | ||
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*'''12 months:''' The year is divided into 12 months, with 31 days in January, March, May, July, August, October, and December; 30 days in April, June, September, and November; and 28 days in February (except in leap years, which occur every four years and have 29 days in February). | *'''12 months:''' The year is divided into 12 months, with 31 days in January, March, May, July, August, October, and December; 30 days in April, June, September, and November; and 28 days in February (except in leap years, which occur every four years and have 29 days in February). | ||
**The 12 months in order are: January, February, March, April, May, June, July, August, September, October, November, December. | **The 12 months in order are: January, February, March, April, May, June, July, August, September, October, November, December. | ||
*'''Leap years:''' Leap years are added to keep the calendar in sync with the Earth's orbit around the Sun. A leap year is any year that is divisible by 4 but not by 100, or any year that is divisible by 400. | *'''Leap years:''' Leap years are added to keep the calendar in sync with the Earth's orbit around the Sun. A leap year is (typically) any year that is divisible by 4 but not by 100, or any year that is divisible by 400. | ||
*'''Weeks:''' The week is a seven-day period that is not based on any astronomical event. It is simply a convenient way to divide up the month. | *'''Weeks:''' The week is a seven-day period that is not based on any astronomical event. It is simply a convenient way to divide up the month. | ||
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