With a smartphone & the right app, you can learn the day of week for any date.

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!