If it was a Sunday on 1 January 2017, what was the day of the week on 31 December 2017?
Year 2017 was normal year,
Number of days in 2017 = 365
So, 52 weeks and one odd day
1st January 2017 was Sunday means 30th December 2016 is Saturday
So, 31st December 2017 would be Sunday
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