Etymograph

English

epact

Epact comes from Latin epactae, and goes back to Ancient Greek ἐπακταί ‘intercalary days’.

  1. Ancient Greekc. 800–300 BCEἐπακταίepaktaí‘intercalary days’
  2. Latinc. 75 BCE–200 CEepactae
  3. Frenchc. 1600–presentépacte
  4. Englishtodayepact

attested reconstructed ? uncertain or disputed

Lineage

  1. Ancient Greekc. 800–300 BCEἐπακταίepaktaí‘intercalary days’
  2. Latinc. 75 BCE–200 CEepactae
  3. Frenchc. 1600–presentépacte
  4. Englishtodayepact

Today it means

noun the time (number of days) by which a solar year exceeds twelve lunar months; it is used in the calculation of the date of Easter

Language periods are conventional ranges, not dates for this word.

Etymograph / Ancient Greek ἐπακταί / epact