Is Heyday free to play?

Yes. Heyday runs in a browser at no cost, with nothing to install and no purchase to make.

How often does Heyday reset?

Once a day. Everybody gets the same puzzle, and a new one replaces it when the game's day rolls over.

On dailygizmos.com, and you can play it inside this page without leaving Alldle.

It sits in Guessing, alongside the other daily games of that kind in the catalogue.

Guessing 14 plays

Guess the English Wikipedia article from ten years of its weekly pageview chart in a new daily challenge.

Heyday

Guessing

Is Heyday free to play?: Yes. Heyday runs in a browser at no cost, with nothing to install and no purchase to make.
How often does Heyday reset?: Once a day. Everybody gets the same puzzle, and a new one replaces it when the game's day rolls over.
What languages does Heyday support?: English.
Where does Heyday run?: On dailygizmos.com, and you can play it inside this page without leaving Alldle.
What kind of game is Heyday?: It sits in Guessing, alongside the other daily games of that kind in the catalogue.

If you play Heyday, the closest things to it in the catalogue are Cutle, Noillirk and Magnitudle. They sit in the same guessing category. See the full list of alternatives.