2025 Julian Calendar Days. It was the official calendar in the roman empire and the western world until 1582, when it was replaced by the gregorian calendar. Use this tool to convert a specified calendar date/time to an equivalent julian day (jd) number.
Enter a valid date or julian date, and click ‘convert’. 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).
