date of reference vs epoch

epoch vs date of reference

date of reference and epoch both are nouns.

Word	Noun	Adjective	Verb	Adverb
date of reference	Yes	No	No	No
epoch	Yes	No	No	No

As nouns, date of reference and epoch are synonyms defined as:

date of reference and epoch: (astronomy) an arbitrarily fixed date that is the point in time relative to which information (as coordinates of a celestial body) is recorded

date of reference (noun)	epoch (noun)
(astronomy) an arbitrarily fixed date that is the point in time relative to which information (as coordinates of a celestial body) is recorded	a period marked by distinctive character or reckoned from a fixed point or event
	a unit of geological time that is a subdivision of a period and is itself divided into ages
	(astronomy) an arbitrarily fixed date that is the point in time relative to which information (as coordinates of a celestial body) is recorded

Difference between date of reference and epoch

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