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1. How many days ago was november 11 2015 how to#
2. How many days ago was november 11 2015 mod#
3. How many days ago was november 11 2015 code#

The Battle of Hastings took place on 14 October 1066.

How many days ago was november 11 2015 code#

The Century Code for the 1900s is zero.Take '69 and divide by 4, discarding the remainder.Humans set foot on the moon: 20 July 1969: Here are three more examples from different centuries: The Moon Landing Match the resulting number in the list below, and you’ll have the day of the week:Įinstein was born on a Sunday. Date Number: 14 (the 14th of the month).

How many days ago was november 11 2015 mod#

(Year Code + Month Code + Century Code + Date Number - Leap Year Code) mod 7 If you can divide a Julian year by 4, it’s a leap year.Įinstein’s birthday was in 1897 which was not a leap year (0), so it doesn’t affect the outcome. But it is a leap year if it’s divisible by 400.ġ992 is a leap year because you can divide it by four.ġ900 is not a leap year because you can divide it by 100.Ģ000 is a leap year because you can divide it by 400. If you can divide a Gregorian year by 4, it’s a leap year, unless it’s divisible by 100. EDIT: If the date is in a January or February of a leap year, you have to subtract one from your total before the final step. The other thing to take into account is whether you are dealing with a leap year. 2 mod 7 = 2, so in this case the Century Code is 2.įor Einsteins birthday in 1897, the Century Code is 2, because it’s a Gregorian date, and the chart above shows that dates in the 1800s get an adjustment of 2. Example 2: if the year is 1625 CE, take the century number, 16, and subtract it from 18, leaving 2. Example 1: if the year is 852 CE, take the century number, 8, and subtract it from 18, leaving 10. If you are looking at a Julian date, the formula is to take the century number and subtract it from 18 and then mod 7. If you are only doing this calendar trick with friends’ birthdays, you could probably leave this step out, because dates that fall in the 1900s get a Century Code of zero and don’t affect the outcome of the calculation. Gregorian Datesįor the Gregorian Calendar, remember the number 4206420: The Gregorian Calendar began on 14 September 1752, skipping 11 days. In Great Britain, and what was to become the USA, the calendar system changed from the Julian Calendar to the Gregorian Calendar on 2 September 1752. You then need to apply an adjustment based on the century.

That would link the month of October with the number zero. For example, Halloween is in October, so to remember that October has a Month Code of zero (represented by an image of a ball), you could picture a group of people in Halloween costumes doing something with a ball. If you are having trouble associating the images with the months, pick an aspect of each month to associate the image with. If the number six is represented by the image of an elephant, picture an elephant in April and July, and so on. You could picture a butterfly in February and March, if you use a butterfly image for the number three.

For example, you could picture a game of soccer (football) in January, with ball being a mnemonic image for zero. I use my Ben System images: Samwise (033) throws a glass of beer (614) on George Boole (625) who falls backwards on Sally (035).Ī way to quickly memorize 033614625035 without a complex mnemonic system would be to use a number shape system to associate images with each month.

How many days ago was november 11 2015 how to#

A Quick Note on Memorizing Numbers If you don't know how to memorize a number like 033614625035, you could either use repetition or learn a mnemonic system like the Major System or Dominic System. For Einsteins birthday in March, it is 3. The Month CodeThis is easy - just memorize the number 033614625035: You could use a number shape image like a swan to hold that in memory while you calculate the items below. 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.