Friday the 13th origins: 10 theories, from the Knights Templar to a 1907 novel

Summary
Why Friday the 13th is unlucky has no proven answer, but these 10 origin theories trace the superstition from the Knights Templar and Norse myth to a 1907 novel
Description from Quartz.
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Friday the 13th origins: 10 theories, from the Knights Templar to a 1907 novel
Why Friday the 13th is unlucky has no proven answer, but these 10 origin theories trace the superstition from the Knights Templar and Norse myth to a 1907 novel
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