Julian Day Calendar 2025 Genovis Printable. Enter either a calendar date, or a julian date and click calculate. Use this tool to convert a specified calendar date/time to an equivalent julian day (jd) number.
Julian dates (abbreviated jd) are simply a continuous count of days and fractions since noon universal time on january 1, 4713 bc (on the julian calendar). Convert from calendar date and time to julian date, and vice versa.