When will the calendar year of 2016 be repeated?

2016 is a leap year starting on Friday. A leap year calendar repeats after 28 years when the sum of odd days is exactly divisible by 7 (7 × 4 = 28). 2016 + 28 = 2044, which is also a leap year starting on Friday, so the calendar repeats. Option B (2021) is only 5 years later, option C (2056) is 40 years later, and option D (2040) is 24 years later - none of these produce the same calendar.