Julian day

Noun

 * 1) A date expressed as a real number of days counted with GMT noon on 1 January 4713  in proleptic Julian calendar (November 24, 4714, in the proleptic Gregorian calendar) as zero; used primarily by astronomers and historians to compare events recorded in different cultures.

Synonyms

 * JD
 * Julian date

Translations

 * Finnish: juliaaninen päivä
 * Irish: lá Iúlach