The World Record of ‘fastest calculation of day from any date up to billion year’s calendar’ has been achieved by Mr. Gyanendra Singh Hada from Bundi, Rajasthan, India.

On April 24, 2014 during an event; Mr. Hada demonstrated his extra-ordinary skill of calculation. He correctly calculated the day from any randomly asked date; from year 01 up to billion year’s calendar, within few seconds.