Julian Day Number from Date Calculator
Calculates Julian Day and Modified Julian Day numbers from Julian and Gregorian calendars.
|The Julian Day number is the number of days elapsed since noon (12:00) on January 1, 4713 BC|
The Modified Julian Day number is the number of days since midnight on November 17, 1858 AD (MJD=JD-2400000.5)
The Gregorian calendar is used for dates on and after October 15, 1582 AD and the Julian calendar is used before October 4, 1582.
Julian Day Number from Date
- Bug report
- Your results are a year out, 1 Jan 2200 will show the Julian day for 1 Jan 2019 because you have taken into account year 0
 2017/11/19 17:10 - / - / - / - /
- Purpose of use
- calculate lunation
 2017/02/23 03:54 Male / 60 years old level or over / High-school/ University/ Grad student / Very /