heyday

Meanings

1. 1
   noun

   the period of greatest success, vigour, or popularity

   In its heyday the resort welcomed thousands each summer.

Simplified etymology

Heyday began in the early 16th century as the exclamation hey-day!, expressing joy, surprise, or another strong emotion, perhaps from Low German heida! or heidi!, “hurrah!” By the late 16th century it meant a state of high spirits or passion, and by the mid-18th century, probably through association with day, it had acquired its modern sense of a period of greatest success or activity.

Originally heyda, an exclamation of joy or surprise (16th century), of which the second element was later associated with day; the noun sense 'period of greatest vigor' developed by the 18th century.

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External links

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