Time - Julian Day Number (JDN)
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About
Julian Day Number (JDN) is numeric time representation that is defined as:
- the number of days
- since noon in Greenwich (UTC)
- on November 24,
- the first day of 4714 B.C.
- according to the proleptic Gregorian calendar.
To more recently, in Terrestrial Time which differs from UTC by a few seconds.