If it was Wednesday on January 1, 1997, which day was it on  January 1, 1992 ?

Tuesday  Wednesday Thursday    Friday

Wednesday

Total number of odd days between the years 1992 and 1997 = (1997 - 1992) + 2 = 7 odd days. The year 1996 & 1992 is a leap year, it has two odd days. So, one extra odd day is added. So, if it was Wednesday on January 1 , 1997, it would be (Wednesday - 7) Wednesday i.e. same day on January 1, 1992 .