What was the day of the week on 22 February 2012?

Using Code Method :-

\(\frac{Date+Month code+Year code+Last 2 digits of yr+Leap yrs till given yr}{7}\)

(Note: Remainder of the above sum will be the code of week day}

 

28 Feb 2012;

22 + 03 + 06 + 12 + 03 = 46

remainder of \(\frac{46}{7}\) = 04

Therefore, the code of 04 is Wednesday