1. heyday - Noun
2. heyday - Interjection
An expression of frolic and exultation, and sometimes of wonder.
The time of triumph and exultation; hence, joy, high spirits, frolicsomeness; wildness.
Source: Webster's dictionaryThe heyday of woman's life is the shady side of fifty. Elizabeth Cady Stanton
When something startlingly new comes up, young people, especially, seize it. You can't complain about that. I think its heyday has passed, but it's had an effect and will continue to have an effect. M. H. Abrams
If the first lady is concerned about this Internet cycle, what would she have done during the heyday when there was 12, 13 editions of a paper in one day? What would she have done with that news cycle? Matt Drudge
The heyday of video music was the mid 80's. Nina Blackwood
J. Lo, whether she is good or bad, is like a fiery movie star, a throwback to Elizabeth Taylor in her heyday. Steven Cojocaru
Having said that, I'm a huge Jack Nicholson fan because he just goes nuts in everything he does. Having Jack in his heyday would also be a dream come true. Paul Kane