Firstly: Fasting the day of `Arafah
It is makruh for a pilgrim to fast the Day of `Arafah. It is mustahabb for a pilgrim not to fast. This is the position of the majority: the Malikis, Shafi`is, and Hanbalis. [1036] Hanafis deem it makruh for a pilgrim to fast if it weakens them.