epoch has definitions from the fields of geology,astronomy
1
[ noun ] a period marked by distinctive character or reckoned from a fixed point or event

Synonyms

era

Used in print

(Leo Lemon, "Catch Up With" and "Something to...)

Pueri_Aquam_De_Silvas_Ad_Agricolas_Portant , a delightful vignette set in the unforgettable epoch of pre Punic_War Rome .

2
[ noun ] (astronomy) the precise date that is the point of reference for which information (as coordinates of a celestial body) is referred

Related terms

date astronomy

3
[ noun ] (geology) a unit of geological time
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