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Since 1950, this has happened in February and March of 1953, 1959, 1970, 1981, 1987, 1998, 2009 and 2015.
The recurrence of a Friday the 13th birthday depends on the month and year in which you were born. Identical calendar years repeat on 6, 11, or 28 year cycles, but any monthly Friday the 13th will occur every 6, 5, 6, and 11 years.Example : February 13th birthday occurs in 1914, 1920, 1925, 1931, 1942, 1948, 1953, 1959, 1970, 1976, 1981, 1987, 1998, 2004, 2009, 2015, 2026Birthdays could be any of the following sequences :6th, 11th, 17th, 28th, 34th, 39th, 45th, 56th, 64th5th, 11th, 22nd, 28th, 33rd, 39th, 50th, 56th, 61st6th, 17th, 23rd, 28th, 34th, 45th, 51st, 56th, 62nd11th, 17th, 22nd, 28th, 39th, 45th, 50th, 56th, 67th
it was a Friday
In the US, that fell on a Friday.
There were 10 leap years between 1970 and 2011.