Convert a Julian date without guessing the convention

September 19, 2026

Gregorian calendar date

Julian Date

2461302.5

Modified Julian Date

61302

Julian calendar

September 6, 2026

Time UT

00:00

JD begins at noon UT; a calendar-date input means midnight. Astronomical year 0 is 1 BCE. MJD = JD − 2,400,000.5.