Zul-Qa'dah Is a month amongst the months of Hajj.
Events taken place during the month of Zul-Qa'dah:-
1) The battle of 'khandaq (trench) or Ahzab' took place in 5 A.H.
2) 6 A.H.-Truce of Hudaubiyah
3) 6 A.H 'Bay'at-e-Rizwaan' (The oath of allegiance named Rizwaan)
4) The return to Makkah for the performance of Umrah by the Prophet and his Companions in 7 A.H.