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Function std.datetime.SysTime.julianDay
The Julian day
for this SysTime at the given time. For example,
prior to noon, 1996-03-31 would be the Julian day number 2_450_173, so
this function returns 2_450_173, while from noon onward, the Julian
day number would be 2_450_174, so this function returns 2_450_174.
Prototype
long julianDay() nothrow @property @safe const;
Authors
Jonathan M Davis and Kato Shoichi