Ibn ‘Abbas said that a Jew who was with him when he recited, “Today I have perfected for you your religion . . ."(Al-Qur’an; 5:3) remarked, “If this verse had been revealed to us we would have made it a festival." Ibn ‘Abbas replied, “It was revealed on a day which contained two festivals, on a Friday and on the day of ‘Arafa."
Tirmidhi transmitted it and said this is a hasan gharib tradition.