Friday is the best day of the week. Imam Bukhari and Muslim reported that Prophet Mohammad (P.B.U.H.) had said, We (Muslims) came last and yet we are the first on the day of judgment. They have received the books before us (meaning Torah and bible). We have received the book after them (meaning the Quran). Friday was their day to be glorified. However, they disputed on that while Allah had told us Friday is the day to glorify. Thus they will follow us. The Jews glorify Saturday, and the Christians glorify Sunday.
Also reported by Imam Muslim, Abo-Dawod, Al-Nesaii, and Al-Termithi, that Prophet Mohammad (P.B.U.H.) had said, The best day during which the sun have risen is Friday. It is the Day Adam was created. It is the day when Adam entered paradise and also when he was taken out from it. It is also the day on which the day of judgment takes place.