Live · Auto-updating
Today's Julian Date
2461273
Julian Day Number
Today's Julian Day Number is 2461273.
What Is a Julian Date?
The Julian Day Number is a continuous count of days since noon on January 1, 4713 BCE — used primarily by astronomers because it makes calculating the number of days between two dates a simple subtraction, without worrying about months, leap years, or calendar quirks.
It shouldn't be confused with the 'Julian date' format sometimes used in manufacturing (a YYDDD code), which is a completely different, calendar-year-based system.
Frequently Asked Questions
Today's Julian Day Number is 2461273.
No — the day of the year resets to 1 every January 1st, while the Julian Day Number counts continuously without ever resetting.
Astronomers and some scientific fields use Julian day numbers because they simplify calculating the number of days between any two dates.