Day of Week Calculation

"What day is your birthday next year?"

There are few people who can instantly answer such questions.

Ability to answer this question instantaneously is a calendar calculation, an example of the ability of Savan Syndrome.

I think that it is impossible for ordinary people to answer.

However, if you know the calculation method it is possible to answer even instantaneously.

This application is for improving calendar calculation ability.

Please try as a part of brain training by all means.

・ Calculate the day of the week from the entered date

・ Calendar calculation quiz answering day of week from date

・ Those who wish to train the brain

・ Person who has confidence in calculation ability

・ Those who want to kill time