Mid 16th century (denoting the age of the moon in days at the beginning of the calendar year): from French épacte, via late Latin from Greek epaktai (hēmerai) 'intercalated (days)', from epagein 'bring in', from epi 'in addition' + agein 'bring'.
For editors and proofreaders
Line breaks: epact
Definition of epact in:
What do you find interesting about this word or phrase?
Comments that don't adhere to our Community Guidelines may be moderated or removed.