Definition

The time period needed to align the solar calendar with the lunar calendar.

Example

The epact helps in determining the dates of religious festivals that depend on the lunar calendar.

Conversation

Have you ever heard about the concept of epact in calendars?

Yeah, I think it has to do with aligning lunar and solar years, right?

Exactly! It’s interesting how they need that epact to make them sync up.

I know! It makes you appreciate how complex our timekeeping really is.

Synonyms & Antonyms

Root Explanation

Epact is derived from the Greek word "epaktē" (meaning added or supplementary), which comes from "epagō" (meaning to bring in or add). The term originally referred to the number of days added to the lunar calendar to synchronize it with the solar calendar.

Memory Tip

Think of something that is 'added' or 'supplementary' — that's what epact means, as it refers to the extra days needed to align the lunar and solar calendars.

Visually Confused Words