Time, Calendars, and Seasons


What is the Gregorian calendar

In addition to moving the calendar forward by 10 days in 1582, Pope Gregory XIII also corrected the error of the Julian calendar. He declared that years ending in “00” would not be leap years, except those divisible by 400 (such as the year 2000). The Julian calendar, with Pope Gregory’s correction, is known as the Gregorian calendar, which most of us use today.


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