13.06.08
Friday the 13th, unlucky day?
When the 1st day of the month falls on a Sunday, the 13th will be a friday.
Every year has at least one and at most three Fridays the 13th, with 688 occurrences during each 400-year Gregorian cycle (146,097 days).
Paraskevidekatriaphobics - people afflicted with a morbid, irrational fear of Friday the 13th, must be pricking up their ears just now, buoyed by seeming evidence that their terror may not be so irrational after all. But it's unwise to take solace in a single scientific study, especially one so peculiar. These statistics have more to teach us about human psychology than the ill-fatedness of any particular date on the calendar.
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