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Every four years, during a leap year, the imperfect match between the length of a calendar year and Earth's orbit result in an interesting calendar adjustment known as a leap day. In this problem set, students calculate the difference between the calendar year and Earth's orbital period, determine how much extra time gets added to our calendar and identify which years omit leap years.
25 February 2020 Edit: 26 February 2020
User submitted, thanks to jpaterson