julianDay property

double julianDay

The Julian day of this Instant.

The Julian day of any instant is the Julian day number plus the fraction of a day since the preceding noon in Universal Time. Julian dates are expressed as a Julian day number with a decimal fraction added.

The Julian day number (JDN) is the number assigned to a whole solar day in the Julian day count starting from 1 Jan -4712 at noon Universal time (January 1, 4713 BC at noon Universal Time) in the proleptic Julian calendar, or 24 Nov -4713 at noon Universal time (November 24th, 4714 BC) in the proleptic Gregorian calendar.

Implementation

double get julianDay => _julianDay ??= _computeJulianDay();