The Julian date calendar is a continuous count of days since noon on January 1, 4713 BC, the start of the Julian Period. It is used in astronomy and other scientific fields to track dates and times over long periods. The Julian date for January 1, 2025 is 2464945.5.
The Julian date calendar is important because it provides a way to track dates and times over long periods without having to worry about the vagaries of the Gregorian calendar, which is based on the Earth’s orbit around the Sun. The Julian date calendar is also used to calculate the time of astronomical events, such as eclipses and planetary conjunctions. The Julian date for January 1, 2025 is 2464945.5.
