There are 104 weeks in two years. This is calculated by multiplying the number of weeks in one year (52) by two. Since a standard year has 52 weeks, two years would naturally have double that amount. This calculation assumes that neither of the two years is a leap year, which has an extra day. If one or both of the years are leap years, the total number of weeks remains the same, but the extra day(s) would mean that the two-year period includes 104 weeks and 1 or 2 additional days.
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