CCommunity
Count the number of odd days from the year 2006 to get the sum equal to 0 odd days.
We get 1 odd day when we have an ordinary year whereas we get 2 odd days when we have a leap year.
Year
2006
2007
2008
2009
2010
2011
Odd days
1
1
2
1
1
1
Sum = 7 days = 1 week = 0 odd day.
Therefore, calendar for the year 2012 will be the same as the year 2006.