January 1, 2004 was a Thursday, what day of the week lies on January 1 2005.
Given that January 1, 2004 was Thursday.
Odd days in 2004 = 2 [because 2004 is a leap year]
Also note that we have taken the complete year 2004 because we need to find out the odd days from 01-Jan-2004 to 31-Dec-2004,
that is the whole year 2004
Hence January 1, 2005 = Thursday + 2 odd days = Saturday