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Assuming a 90 year spell includes 22 leap years, the number of days is equal to (68 x 365) + (22 x 366) = 24820 + 8052 = 32872 days. If the 90 year spell includes 23 leap years, the number of days is equal to (67 x 365) + (23 x 366) = 24455 + 8418 = 32873 days. 3 people found this useful.
and it will equal 365 days for the year. The 2007 calendar begins on a Monday and ends on a Monday which comes to 52 weeks and one day. . 7x52 = 264 + 1 = 265 days in a year. When there is a leap year it is 52 weeks and 2 days (366 days in the year) A Mean Solar day is: 24 hours 3 minutes 56.55 seconds A tropical year is: