Friday the thirteenth

== English == === Alternative forms === Friday the 13th === Etymology === Believed to have been derived from the mass arrest of the Knights Templar on Friday, October 13, 1307. === Noun === Friday the thirteenth (plural Fridays the thirteenth) A particular date combination that occurs when the thirteenth day of a month falls on a Friday, and which is considered unlucky in some cultures. ==== Synonyms ==== Black Friday (in one of its senses) ==== Translations ====