Inverse JD (Julian Date) Calculator For the Julian and Gregorian Calendars

Enter any positive JD number or Julian Date in the range from
JD = 0.00000000  to  JD = 5373484.00000000    to compute
the corresponding dates and times on the Julian and Gregorian calendars




Calendar Input Mode:    Julian              Gregorian 
J   2017     March
SunMonTueWedThuFriSat
    1 2 3 4 5
6 7 8 9 10 11 12
13 14 15 16 17 18 19
20 21 22 23 24 25 26
27 28 29 30 31    
      
G   2017     March
SunMonTueWedThuFriSat
      1 2 3 4
5 6 7 8 9 10 11
12 13 14 15 16 17 18
19 20 21 22 23 24 25
26 27 28 29 30 31  

 For JD (Julian Date) = 2457838 on the Gregorian Calendar, the
 corresponding date and time is: 2017 Mar 25  at 12:00:00.000 - Sat

 JD (Julian Day) Number For Gregorian Calendar Date = 2457838
NOTE:
There is a distinction to be made between the JD (Julian Date) and the JD (Julian Day) Number. They are not exactly numerically equivalent but can sometimes be confused as such.

The JD (Julian Date) corresponds to a specific date and time of day. It is usually a fractional value and only equates to an integer value at noon on the corresponding date, at which point it also equates to the standard JD Number for that calendar date.

The JD (Julian Day) Number is ALWAYS an integer value. It is simply the sequential serial count of the number of calendar days since the mathema- tical origin of the respective calendar system to which it applies.

Every date on either the Julian or Gregorian calendar system has a unique sequential Julian Day (JD) Number to distinguish it from every other date on the calendar.
Jay Tanner - 2017