The Treaty of Hudaybiyyah was an event that took place during the time of the Islamic prophet Muhammad.

It was a pivotal treaty between Muhammad, representing the state of Medina, and the Qurayshi tribe of Mecca 

The treaty of Hudaibiyah was signed in 628 January

while 

Sulah Hudaibiya signed for 10 years

Sulah e Hudaibiya is called Fatah Al-Mubeen in Surah Al-Fatah

Treaty of Hudaybiyyah was concluded in 8th Hijri.