Julian Date Calendar 2024 Calculator. Julian dates (abbreviated jd) are simply a contiguous count of days and fractions since noon universal time on 1st january, 4713 bce (on the julian calendar). Examples of julian date conversion using a variety of formulas.

The calculator below transforms the date from the gregorian calendar to julian and vice versa. A julian calendar converter translates a gregorian calendar date (like today’s date) into a julian day today, a continuous count of days since a specific historical date.