The best day the sun rises on
خَيْرُ يَوْمٍ طَلَعَتْ عَلَيْهِ الشَّمْسُ يَوْمُ الْجُمُعَةِ
Khayru yawmin tala'at 'alayhi-sh-shamsu yawmu-l-jumu'ah.
"The best day on which the sun rises is Friday."
Narrated by Abu Hurayrah. Sahih Muslim 854
A short reflection
The hadith continues: on it Adam was created, entered paradise, and was sent down. Friday is a full-weight gift, treat it that way.