loadingdebt.blogg.se

We’ve removed all the sevens from 121 until we are left with a remainder of 2. ” Mod” means to divide the number and keep only the remainder.

Then add 24 back into the YY number, which is 97 in this case, resulting in 121. For the year 1897, it’s 97.įirst, divide YY by 4 and discard the remainder: 97 div 4 = 24. To calculate the Year Code, use this formula: I’ll run through an example with the date, 14 March 1897 - Einstein’s birthday. (Year Code + Month Code + Century Code + Date Number - Leap Year Code) mod 7 Here's How it Works It allows you to take a date, like 14 March 1987, and mentally calculate which day of the week it fell on. Here is a calendar calculation technique that I learned from a book called Mind Performance Hacks.