How many fasts are there in zul hajj?

In the month of Zul-Hijjah, there are no obligatory fasts. However, it is recommended to fast on the 9th of Zul-Hijjah, known as the Day of Arafah, especially for those not performing Hajj, as it expiates sins from the previous year and the coming year. Additionally, some people choose to fast on the 10th of Zul-Hijjah, known as Eid al-Adha, although it is not obligatory.