The days of al -Tashreeq are the three days that follow the Eid al -Adha and start on the 11th of Dhu al -Hijjah. During the three nights of Tashreeq, the pilgrims stay in Mina, and it is permissible for the urgent to leave them on 12 before sunset.
Learn more about the days of Tashreeq in this video.