How it works
Every day at midnight (Italian time) a new Quiz of the Day arrives: just one quiz, the same for everyone. It's picked from the quizzes on the site, across the different modes: one day it might be a Classic with four answers, the next a Picture or a Yes or No.
You see the mode before you start, and you find out the subject with the question. Otherwise it plays like every other quiz on the site: same timer, same grade from 2 to 10, same hints. You can play it once a day. At the end you see how you did and how long until the next one.
As a guest or with an account
The Quiz of the Day is open to everyone, even if you don't have an account. As a guest your grade counts once (1x) and is saved in the browser you're using.
With an account, a correct answer counts double: your grade is multiplied by 2 and added to your score. If you sign up for free from the same browser within about a month, you'll also find the games you played as a guest in your profile, with the scores they had back then.
Timing, grades and hints for every mode are in the quiz guide. If you've already played today's quiz, there are more to play in the online quiz games and in the collections.