heyday

noun

1. A period of success, popularity, or power; prime.

   “The early twentieth century was the heyday of the steam locomotive.”

   “Must your hot ytch and plurisie of lust, The heyday of your luxury, be fedd Up to a surfeite, and could none but I Be pickt out to be cloake to your close tricks, Your belly-sports?”

   “She started learning the craft at age 13 from her father, who founded the family's tile business, Kam Fat Mahjong, in 1962. Masters who would visit Hong Kong during its manufacturing heyday in the 1970s and 80s also shared their techniques and trained apprentices.”

   “There has been a marked shift in viewing habits since the channels’ heyday, with music videos now more commonly consumed on YouTube and social media rather than television.”

2. (archaic)An exultation of the spirits; gaiety; frolic.

intj

1. A lively greeting.

   “"Heyday, Miss Morland!" said he. "What is the meaning of this? I thought you and I were to dance together."”

2. (obsolete)An expression of frolic and exultation, and sometimes of wonder.

   “"Come follow me, my wags, and say, as I say. There's no riches but in rags; hey day, hey day, &c."”

   “Bass. Heydey! good words, good words, I must beleeue'em And be a Coxcombe for my labor.”

   “Here Jones, having ordered a servant to show a room above stairs, was ascending, when the dishevelled fair, hastily following, was laid hold on by the master of the house, who cried, “Heyday, where is that beggar wench going? Stay below stairs, I desire you.””