Julian Calendar October 2025 Date. 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). After entering a new year, click anywhere in the window (outside the year field) to see the new julian date.

Convert from calendar date and time to julian date, and vice versa. Pressing the enter key, after changing the year, is the same as.