It's from Old English and is "short" for "fourteen nights" which when it came through to modern english came as fortnight. that makes sense as a fortnight is a period of 2 weeks.
Return to FunTrivia
"Ask FunTrivia" strives to offer the best answers possible to trivia questions. We ask our submitters to thoroughly research questions and provide sources where possible. Feel free to post corrections or additions. This is server B184.