Fiqh-us-Sunnah Volume 2, Supererogatory Prayer, Fiqh 2.125.

Friday (Jumu’ah) is the best day of the week.

Abu Hurairah reports that the Messenger of Allah sallallahu alehi wasallam said: “The best day on which the sun rises is Friday. [On Friday] Adam was created and on that day he entered paradise and on that day he was expelled from paradise. And the Hour will come to pass on Friday.” This is related by Muslim, Abu Dawud, an-Nasa’i, and at-Tirmizhi who calls it sahih.

Abu Lubanah al-Badri relates that the Prophet said: “The most prominent of the days [lit. the leader of the days] is the day of Jumu’ah and the most honoured in Allah’s sight, and it is more honoured in Allah’s sight than the day of breaking the fast or the day of sacrifice. It has five significant merits: Allah created Adam on this day; on this day Allah sent Adam down to the earth; on this day, Allah caused Adam to die; on this day, there is a time during which if anyone asks anything of Allah it will be granted to him unless he asks for something which is forbidden; and on this day, the Hour will be established. There are no angels close to Allah or sky or earth or wind or mountain or sea who are not worried concerning the day of Jumu’ah.” This is related by Ahmad and Ibn Majah. Al-Iraqi says its chain is hasan.