If 6th March, 2005 is Monday, what was the day of the week on 6th March, 2004?  Choose the correct choice from the following
A) Saturday  B) Sunday  C) Monday  D) Friday  E) Thursday
The year 2004 is a leap year. So, it has 2 odd days.   But, Feb 2004 not included because we are calculating from March 2004 to March 2005.   So it has 1 odd day only.   The day on 6th March, 2005 will be 1 day beyond the day on 6th March, 2004.   Given that, 6th March, 2005 is Monday.   6th March, 2004 is Sunday (1 day before to 6th March, 2005).   Answer is Sunday.
<result>B</result>
If 6th March, 2005 is Monday, what was the day of the week on 6th March, 2004?