How To Find The Day Of The Week Of Any Date! -Calendar Trick- Math Magic Trick -Amaze Your Friends!

Calendar (Day Of The Week) Trick.
Maths calculation trick.
Amaze Your Friends! Show them you can calculate in which day of the week they were born!
Birthday trick.
How to find the day of the week of any date, in the past or future.
Magic math trick!
Calendar magic trick.

[tricksfun]

Correction:

*November's key value is 4*

[inchtrucker]

Not the easiest way however, there are ways in which leap year does not need to be announced for because the algorithm already includes this idea in to the calculations automatically, throwing away an unnecessary step.