Truncated Julian Day (TJD)

TJD = MJD - 40000 = JD - 2440000.5

(TJD : Truncated Julian Day; MJD : Modified Julian Day; JD : Julian Day Number *, starts at 12:00 noon UT)

* The Julian Day Number (JD) is the integral part of the Julian Date.
  The Julian Date (also JD) is the interval of time in days and fraction of a day since 4713 B.C. January 1, Greenwich noon.

last update: 2003-08-22
editor: Helmut Steinle   (email: