Question
What was the day of the week on 23rd July
2015?Solution
2000 years have 0 odd day, 14 years = 3 leap years + 11 ordinary years = {(3 ×2)+ (11 ×1)} odd days = (6 + 11) odd days = 2 weeks + 3 odd days January = 31 February = 28 March = 31 April = 30 May = 31 June = 30 July = 23 Total = 204 days = 1 odd day Total number of odd days = (0 + 3 + 1) = 4 odd days ∴ Required day was Thursday.
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