What is the preferred time frame for performing the three days of fasting required for Hajj Tamattu?

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The preferred time for performing the three days of fasting is between assuming the Ihram for Hajj and the Day of Arafah, with the last of the three days being the Day of Arafah. This view is held by Tawus, and reported from Ata, Ash-Sha'bi, Mujahid, Al-Hasan, An-Nakha'i, Sa'id ibn Jubayr, 'Alqamah, 'Amr ibn Dinar, and the People of Opinion. Ibn Umar and Aisha narrated that it should be observed between assuming the Ihram and the Day of Arafah, which suggests the last day is Yawm at-Tarwiyah. This is the position of Ash-Shafi'i because fasting on the Day of Arafah while at Arafah is not recommended. The explicitly transmitted position from Ahmad aligns with the view that the last day is the Day of Arafah, as supported by the aforementioned scholars, due to the necessity associated with the pilgrim's need for the Day of Arafah fast in this context.