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Calculating the exact number of Fridays that fall on the 13th of the month since the beginning of time is complex due to the varying lengths of calendars and historical changes. However, in the modern Gregorian calendar, it can be determined that each month has a 1 in 7 chance of having a Friday the 13th, leading to an average of about 1-3 occurrences each year. Over a long period, such as a millennium, this could amount to thousands of instances, but an exact count would require specific parameters and calculations.

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3mo ago

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