Oxford, BA, 1974; Oxford, MA, 1979; London University, MS, 1979.
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Using the Gregorian calendar, the day would have been a Wednesday. On the Julian calendar the day was a Sunday.
almost everything... The major difference between the two calendars is the Julian calendar has 100 leap years in every 400 years, and the Gregorian calendar has 97 leap years in every 400 years. That makes the average length of a Julian calendar year 365.25 days and the average length of a Gregorian calendar year 365.2425 days. As a result, it takes only about 128 years for the Julian calendar to accumulate a full day of error, but for the Gregorian calendar to accumulate a full day of error takes about 3200 years.
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The Julian calendar has the same month names, the same year numbering, and the same number of days per month as the Gregorian calendar. Aside from making New Year's Day the same around the world (1 January), the only difference between the calendars is that in any 400-year period the Gregorian calendar has three fewer days than the Julian calendar. In the 400-year period that began on 1 January 2001, the three days that are part of the Julian calendar but not part of the Gregorian calendar are 29 February 2100, 29 February 2200 and 29 February 2300. The Julian calendar accumulates one day of error every 128 years. The Gregorian calendar accumulates one day of error every 3200 years.