Question

heyday noun In its earliest appearances in English, in the 16th century, heyday was used as an interjection that expressed elation or wonder (similar to our word hey, from which it derives). Within a few decades, heyday was seeing use as a noun meaning "high spirits." This sense can be seen in Act III, scene 4 of Hamlet, when the Prince of Denmark tells his mother, "You cannot call it love; for at your age / The heyday in the blood is tame…." The word's second syllable is not thought to be borne of the modern word day (or any of its ancestors), but in the 18th century the syllable's resemblance to that word likely influenced the development of the now-familiar use referring to the period when one's achievement or popularity has reached its zenith. : the period of one's greatest popularity, vigor, or prosperity

Accepted Answer

September 5, 2020 HAY-day "The theater engaged Mr. Leslie ‘Les' Jones to build and paint the sets. He was in his early sixties when I arrived—he'd been a legendary scene painter during the heyday of vaudeville." — Kate Bornstein, A Queer and Present Danger, 2012"But there are few drive-in theaters left. They've dwindled to just a handful in the Twin Cities since their heyday in the 1950s and '60s. There are only six left in Minnesota." — Kathy Berdan, TwinCities.com (St. Paul, Minnesota), 26 July 2020

Word	heyday
Date	September 5, 2020
Type	noun
Syllables	HAY-day
Etymology	In its earliest appearances in English, in the 16th century, heyday was used as an interjection that expressed elation or wonder (similar to our word hey, from which it derives). Within a few decades, heyday was seeing use as a noun meaning "high spirits." This sense can be seen in Act III, scene 4 of Hamlet, when the Prince of Denmark tells his mother, "You cannot call it love; for at your age / The heyday in the blood is tame…." The word's second syllable is not thought to be borne of the modern word day (or any of its ancestors), but in the 18th century the syllable's resemblance to that word likely influenced the development of the now-familiar use referring to the period when one's achievement or popularity has reached its zenith.
Examples	"The theater engaged Mr. Leslie ‘Les' Jones to build and paint the sets. He was in his early sixties when I arrived—he'd been a legendary scene painter during the heyday of vaudeville." — Kate Bornstein, A Queer and Present Danger, 2012 "But there are few drive-in theaters left. They've dwindled to just a handful in the Twin Cities since their heyday in the 1950s and '60s. There are only six left in Minnesota." — Kathy Berdan, TwinCities.com (St. Paul, Minnesota), 26 July 2020
Definition	: the period of one's greatest popularity, vigor, or prosperity

Heyday Word Noun Scene Period One's September Hay Day