The three days following `Īd al-Aḍḥā are the Days of Tashrīq (the 11th, 12th and 13th of Dhu’l-Ḥijjah). These days are mentioned by Allah when He says: Remember Allah during the Appointed Days. The Messenger of Allah ﷺ described them as days of eating and drinking and remembrance of Allah. Fasting is thus forbidden on `Īd and the Days of Tashrīq. Just as we tried to draw close to Allah by fasting before `Īd, we now draw close to Him by enjoying that which He has bestowed us with. All that the slave must do is obey the order of his Lord, knowing that therein is His pleasure and safety from following his own caprice.
Anyone who wishes to fast the White Days must not fast on the 13th of Dhu’l-Ḥijjah. They can fast the 14th, 15th and 16th instead.