Template:YMDJ2MJD

Conversion from year-month-day Julian calendar and proleptic Julian calendar with astronomical year numbering to Modified Julian Day.

Usage:

{{YMDJ2MJD|year|month|day}}

{{YMDJ2MJD}}

See also Template:YMD2MJD.

Examples:

{{YMDJ2MJD|-4712|01|01}} = -2400001, this is 12 hours before starting point of JD (the year is 4713 BC)

{{YMDJ2MJD|0000|03|01}} = -678883, March 1, ISO year 0 (1 BC)

{{YMDJ2MJD|0100|03|01}} = -642358

{{YMDJ2MJD|0200|03|01}} = -605833

{{YMDJ2MJD|0300|03|01}} = -569308

{{YMDJ2MJD|1582|10|04}} = -100841, last date before Gregorian calendar{{YMDJ2MJD|1858|11|5}} = 0, begin of MJD epoch

{{YMDJ2MJD|1900|02|28}} = 15090, last day of February 1900

{{YMDJ2MJD|1900|02|29}} = 15091, bogey but okay

{{YMDJ2MJD|1900|03|01}} = 15092, no leap year

{{YMDJ2MJD|1900|02|30}} = 15092, bogey but okay

{{YMDJ2MJD|1900|03|02}} = 15093

{{YMDJ2MJD|1995|09|14}} = 49987, USNO test date (49987)

{{YMDJ2MJD|2000|02|29}} = 51616, last day of February 2000

{{YMDJ2MJD|2000|02|30}} = 51617, bogey but okay

{{YMDJ2MJD|2000|03|01}} = 51617, leap year

{{YMDJ2MJD|2000|02|31}} = 51618, bogey but okay

{{YMDJ2MJD|2000|03|02}} = 51618

{{YMDJ2MJD|2024|12|25}} = 60682, the current Gregorian date interpreted as Julian date, gives current MJD + 13.