Islamic concepts

Ṣalāt al-Jumuʿah — Friday prayer gathering

صلاة لجمعة In Islam, every Friday is a day with abundant benefits from Allāh. On Fridays, Muslims gather for Ṣalāt al-Jumuʿah, the community prayer.

The Friday prayer gathering is considered mandatory for men.

http://en.wikipedia.org/wiki/Jumuah