Find The Day Of The Week For Any Date With This Maths 'Magic' Trick

In 1970, British mathematician John Conway devised a way to quickly calculate the weekday of any given date without the help of calculators, computers, or calendars. It is called the doomsday algorithm and the best thing about this algorithm is that your friends will think you have a superhuman memory, when all you need to do is memorize a set of numbers and do a series of simple calculations.Show more

Conway algorithm bases on the fact that some dates always fall on the same weekday within any given year. These dates are called doomsdays. There are plenty of scary doomsday formulas out there, but how about those of us who don't hold a degree in mathematics?

There are couple of steps to do this, the first one is to memorize weekdays as numbers because according to Conway, each weekday is represented by a number, for example: Sunday is 0, Monday is 1, Tuesday is 2 and so on. You need to memorize these numbers before moving on. As a mental anchor, it may be helpful to think of Tuesday as “Twosday”.

To determine the doomsday of the year in question, you have to follow a series of 6 simple calculations. Before you start, don't forget to memorize the weekday numbers and century anchor days and the most important thing is no to give up.
This might sound awfully complicated at first, and most of us will need a good minute or three to go through all the steps. But with a little practice things will soon pick up speed. If you want to find out a more detailed info about any day, just watch the video to the end.