Julian Date Calendar 2025 Quadax. 2020, 2021, 2022, 2023, 2024, 2025, 2026,. 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).
Astronomers often need to know the difference between two dates, or to be able to calculate the next date. Enter a valid date or julian date, and click ‘convert’.