Step 1 : Introduction to the question "How many days are there in a fortnight?"
...A fortnight is a unit of time equal to 14 days or 2 weeks. The word derives from the Old English: feowertyne niht, meaning "fourteen nights". Some wages and salaries are paid on a fortnightly basis; however, in North America it more common to use the term biweekly. In tennis, Wimbledon and the other Grand Slam tournaments are played over two weeks and are often referred to as lasting a fortnight. In astronomy, a lunar fortnight is half a lunar synodic month, equivalent to the mean period between a full moon and a new moon. This is equal to 14.77 days.