Thursday, June 12, 2008

Gregorian calendar

The Gregorian calendar is the one most used now a days. It is named after Pope Gregory XIII who introduced it in 1582. There is a leap year every four years ( or more precisely, 97 leap years every 400 years). This means that the year corresponds closely with the astronomical year so that it is just one day out in every 3,300 years.


In Gregorian calendar, July and August have same no. of days because Augustus ceaser wanted to be equivalent of julius caeser so 1 day was taken out of february to make august of 31 days.


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