Answers

2016-02-05T01:13:30+05:30
SUNDAY
well 2004 is a leap year so it has 2 odd days
but feb moth is not included because we are calculating march to march(march 2005 to march 2004) so it has only one odd day 
the day of 6th march 2005 will be just one day beyond the day on 6th march 2004
its given that 6th march 2005 is sunday therefore 6th march 2004 is sunday(1 day before to 6th march 2005)
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2016-02-05T15:10:23+05:30
If today (5th apr 2016) is Monday, then 5th Apr 2017 will be a Tuesday ignoring the leap year process. similarly if 6th March 2005 is Monday, then 6th March 2004 will be a Sunday.
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