vierzehn Tage

Noun

 * 1)  a fortnight, fourteen days, two weeks

Usage notes
In traditional and dialectal use, this was a set phrase, and it was possible to speak of "eine vierzehn Tage" (a fortnight) or "drei vierzehn Tage" (three fortnights, or six weeks). In current Standard German, these would be "zwei Wochen" and "sechs Wochen" respectively.