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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.
Best Answer: There are 365 days each calendar year, except for leap calendar years which are 366 days. A leap year happens every four years. Scientifically, there are 365 and 1/4 days in a year, because it takes the earth 365 and 1/4 days to go completely around the sun.