The year 1990 has 365 days i.e. 1 odd day, year 1991 has 365 days i.e., odd day, year 1992 has 366 days
i.e., 2 odd days.
Likewise year 1993, 1994, 1995 have 1 odd day each.
The sum of odd days so calculated from year 1990 to 1995
( 1 + 1 + 2 + 1 + 1 + 1 ) = 7 odd days.
Hence the year 1996 will have the same calender as that of the year 1990.