Julian Date Conversions

This tool will convert between Gregorian (modern) dates, and Julian dates.

Gregorian to Julian

Enter the date using the format shown, and an optional time using a 24 hour clock, i.e. 3pm is expressed as 15:00:00. Use two digits for the hour month and second, i.e. 03:05:00 for 3:05am.

Julian to Gregorian

Enter the fractional date, then click the solid up-arrow.

Click Menu button (at right) to return.