Yes, the possessive form of the noun week is the correct form for 'the end of the week' (the week's end).
Week-end at Zuydcoote was created in 1949.
Bon week-end or Aie/Ayez un bon week-end !
The Week ended in 1941.
No, it's a noun. Incidentally, "end of the week" is not a sentence, it is a phrase.
The duration of Week-End at the Waldorf is 2.17 hours.
The duration of Week-End in Havana is 1.35 hours.
le week-end - la fin de semaine
Week End Tour was created on 2004-10-04.
Week-End at the Waldorf was created on 1945-10-04.
Week-End in Havana was created on 1941-10-08.
The Week-End - 1921 was released on: USA: 1921