Outline

Julian day is total days count from noon on 1 January, B.C. 4713. Number after the decimal point shows time in the day, and 0 a.m. is shown 0.5. Julian Day is used as the standard temporal axis in this web site because it is contiguous.

Temporal Range

From: -1930711.5 （B.C. 9999-01-01 in Julian Calendar）

To: 5373483.5 （A.D. 9999-12-31 in Gregorian Calendar）

Source

Dershowitz & Reingold 2007. Calendrical Calculations. Cambridge University Press.

Format

Julian Day is expressed only as number. Users cannot specify the expression format.

Note