Quote:
Originally Posted by skysurfer
You mean UTC Oh. 12 is the American way to determine both midnight and noon.
Unless the JD is New Zealand time zone based.
Btw, what a stupid invention those timezones, but that is a different topic.
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No. Lifted from wikipedia.
The
Julian Day Number (
JDN) is the integer assigned to a whole solar day in the Julian day count starting from noon
Universal time, with Julian day number 0 assigned to the day starting at noon on Monday, January 1,
4713 BC,
proleptic Julian calendar (November 24, 4714 BC, in the
proleptic Gregorian calendar),
[1][2][3] a date at which three multi-year cycles started (which are:
Indiction,
Solar, and
Lunar cycles) and which preceded any dates in recorded history.
[4] For example, the Julian day number for the day starting at 12:00
UT on January 1, 2000, was 2,451,545.