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Gregorian Calendar: Dates
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Despite its widespread use, the Gregorian calendar has a number of weaknesses. It cannot be divided into equal halves or quarters; the number of days per month is haphazard; and months or even years may begin on any day of the week. Holidays pegged to specific dates may ... fall on any day of the week, and vanishingly few Americans can predict when Thanksgiving will occur next year.
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Shakespeare and Cervantes apparently died on exactly the same date (23 April 1616), but in fact Cervantes predeceased Shakespeare by ten days in real time (for dating these events, Spain used the Gregorian calendar, but Britain used the Julian calendar). This coincidence ... has allowed UNESCO to make 23 April the World Book and Copyright Day.
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The Gregorian calendar was introduced in 1582 in parts of Europe it was adopted in 1752 in Great Britain and its colonies, and on various dates in other countries. If you were on the look out of some distinct literature on Belize Central America, then maybe this write-up has enhanced your acumen. America's heart on Inaguration Day.
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Similar to the Win32 paradigm - the .NET Framework handles dates in the Gregorian calendar by using data structures. Therefore, when you use the methods provided by the DateTime structure, you must be aware that the members such as the DateTime.Day property, the DateTime.Month property, the DateTime.Year property, and the DateTime.AddDays method are based on the Gregorian calendar. Even if you change the current calendar in your application's code or change date and time settings through the Regional And Language Options property sheet, the Gregorian calendar is still used to perform the calculations for these methods. This functionality prevents the arithmetic performed by these methods from being corrupted by a user's settings. If you want to perform culture-sensitive date and time operations based on the current calendar, you must use the DateTimeFormatInfo.Calendar property to call methods provided by the Calendar class such as Calendar.GetDayOfMonth, Calendar.GetMonth, Calendar.GetYear, and Calendar.AddDays.
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Within Joda-Time the Gregorian calendar system can be used by obtaining an instance of GregorianChronology. This is normally created using the factory method GregorianChronology.getInstance(). This is then passed into the constructors of the main date and time classes.
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The year starts on 11 September in the Gregorian Calendar or on the 12th in (Gregorian) Leap Years. The Coptic Leap Year follows the same rules as the Gregorian so that the extra month always has 6 days in a Gregorian Leap Year. The names of the months and their starting dates are as follows:
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