jan 1, 628 - Treaty of Hudaybiyyah

Description:

It was a pivotal treaty between Muhammad, representing the state of Medina, and the Qurayshi tribe of Mecca in January 628 (corresponding to Dhu al-Qi'dah, AH 6). It helped to decrease tension between the two cities, affirmed peace for a period of 9 years, 9 months and 9 days, and authorised Muhammad's followers to return the following year in a peaceful pilgrimage, later known as The First Pilgrimage.[1][2][3]

https://en.wikipedia.org/wiki/List_of_expeditions_of_Muhammad