# heyday

> English word · Noun · IPA /ˈheɪdeɪ/ · frequency rank #25,784

## Definitions
1. A period of success, popularity, or power; prime.
2. An exultation of the spirits; gaiety; frolic.

## Etymology
Late 16th century, from earlier heyda (1520s), as exclamation – compare hey, hei. Sense “period of success, vigor” is a respelling as heyday based on unrelated day (as “period of time”) – compare day in the sun.

## Easily confused with
- **heady** (https://plainspell.com/en/vs/heady-vs-heyday)
- **Hendry** (https://plainspell.com/en/vs/hendry-vs-heyday)
- **headway** (https://plainspell.com/en/vs/headway-vs-heyday)

## Common misspellings (9)
`ehyday`, `hedyay`, `heyady`, `heydayy`, `heydday`, `heydya`, `heyyday`, `hheyday`, `hyeday`

## Source
Compiled from Wiktionary via kaikki.org (CC BY-SA). Data vintage: 2026-05-06.
Canonical page: https://plainspell.com/en/word/heyday