2 weeks. It is 14 days, which is 2 weeks, which is 1 fortnight. Its not the game, FortNite, which is spelled differently, its just 2 weeks.
Mike: I just played FortNite for a fortnight!
Liam: Wait, what?
Mike: I played FortNite for 2 weeks, which is a fortnight, its kind of confusing now that FortNites popular.
Liam: So you played FortNite 14 days straight?
Mike: Yep, for a fortnight.
International taco fortnight originated around 2012 in the Monterey Bay Area of California and is an annual festive event to celebrate tacos and Mexican cuisine in general, lasting one fortnight (or longer if desired). One is encouraged, but not required, to consume tacos on a daily basis for the duration of this event. Documenting your activities relating to this event on video or otherwise is encouraged, however frowned upon by some as "yet another image of food". The exact date of this event fluctuates and typically is announced a few weeks ahead of time.