26th January 1983 =(1,600 + 300 + 82 + upto 26th January) 1,600 year will have ‘0’ odd days and 300 years will have 1 odd day. In 82 years 20 leap years and 62 non-leap years. The number of odd days in 82 years odd days. 1st January to 26th January, 5 days 1 + 4 + 5 = 10 odd days = 3 odd days. ∴26th January 1983 was Wednesday.