What was the day of the week on 28th May, 2006?
Thursday
Friday
Saturday
Sunday
Explanation:
28 May, 2006 =2005 years + Period from 1.1.2006 to 28.5.2006
Odd days in 1600 years = 0
Odd days in 400 years = 0
5 years = 4 ordinary years + 1 leap year = 4 x 1 + 1 x 2 $\equiv$ 6 odd days