Jummah

Jumu'ah (Arabic: صلاة الجمعة ‎‎, ṣalāt al-jum`ah, "Friday prayer"; Persian: نماز جمعه‎‎, Namaz Jumah; Turkish: Cuma Namazı, Juma Namazi), is a congregational prayer (ṣalāt) that Muslims hold every Friday, just after noon instead of the Zuhr prayer. Muslims pray ordinarily five times each day according to the sun's sky path regardless of time zones.

It is mentioned in the Quran:

O ye who believe! When the call is proclaimed to prayer on Friday (the Day of Assembly, yawm al-jumu'ah), hasten earnestly to the Remembrance of Allah, and leave off business (and traffic): That is best for you if ye but knew!
And when the Prayer is finished, then may ye disperse through the land, and seek of the Bounty of Allah: and celebrate the Praises of Allah often (and without stint): that ye may prosper.

From hadith:

Narrated Abu Huraira: The Prophet said, "On every Friday the angels take their stand at every gate of the mosques to write the names of the people chronologically (i.e. according to the time of their arrival for the Friday prayer) and when the Imam sits (on the pulpit) they fold up their scrolls and get ready to listen to the sermon."

Muslim ibn al-Hajjaj an-Naysaburi relates that the Islamic prophet Muhammad used to read Surah 87 (Al-Ala) and Surah 88, (Al-Ghashiya), in Eid Prayers and also in Friday prayers. If one of the festivals fell on a Friday, Muhammad would have made sure to read these two Surahs in the prayers.

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