Julian Day

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Julian day

[′jül·yən ¦dā]
The number of each day, as reckoned consecutively since the beginning of the present Julian period on January 1, 4713 B.C.; it is used primarily by astronomers to avoid confusion due to the use of different calendars at different times and places; the Julian day begins at noon, 12 hours later than the corresponding civil day.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.

Julian Day

(religion, spiritualism, and occult)

For simplifying certain kinds of calculations, it was found to be helpful to delete references to months and years, and simply number all days consecutively. Each such numbered day is referred to as a Julian Day (JD).

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