Be the life of the party by calculating any day of week in your head. Quickly determine what day a contract was signed. Impress your friends & colleagues with your newfound skill.

QUIZ MODE
Test your knowledge against random dates. If you need help, a simple tutorial waits nearby.

TIMER
Countdown clock for extra challenge!

LOOKUP
Look-up the day you were born or perhaps Independence Day 1776. You're only limited by your imagination.

SETTINGS
Focus your learning on a particular century to gain better skills.

WIKIPEDIA-POWERED
Learn interesting facts on certain days from Wikipedia, the Free Encyclopedia.

DARK MODE READY
Transition along with your mobile device.

MULTI-LINGUAL SUPPORT
Try it in English, Spanish, French & German!