Converting between Julian and Gregorian Calendar in One Step
Stephen P. Morse, San Francisco


    Century Year     Month     Day
Julian date        
Gregorian date        

Specify the month and day that the Julian year number was incremented (why?)

In England and the United States, the Julian year number changed on March 25

Julian year number was incremented on

When each country switched over

Civil calendar in use today is the Gregorian one
Different countries switched from the Julian Calendar to the Gregorian Calendar at different times

  Country     Last Julian Date     First Gregorian Date  

Country switchover dates presented here come from

© Stephen P. Morse, 2011