Doomsday Method

Unlock the Secrets of Date Calculation

Become a mental math wizard and impress your friends!

Learn how to easily and accurately determine the weekday of any date, with comprehensive resources and guidance at your fingertips.

Challenge your mind with daily exercises and sharpen your mental skills to become a date calculation pro with regular brain training exercises.

Master the Doomsday Method while tracking your progress and statistics to identify areas for improvement, and ultimately be a confident mental math wizard.