Congregational prayers can be offered anywhere and at any time for any and all of the five daily obligatory prayers. On Fridays, however, Muslims are commanded by the Almighty to attend what is known as the ‘Jummah salaat’:
” O you who believe! When the call is proclaimed to prayer on Friday (the Day of Assembly), hasten earnestly to the Remembrance of Allah (God), and leave off business (and trade): That is best for you if you only knew!”
Qur’an (62:9). It is at this Friday prayer that the weekly sermon is delivered to the congregants.
The Prophet (peace be upon him) said,
“The five daily prayers, and praying one Friday prayer and the next, and the fasting of Ramadan, result in the expiation of the sins committed between them, so long as major sins are avoided.”
This does not, however, mean that the Muslims should come to the mosque only on Fridays, neglecting it at other times, nor does it mean that Muslims should indulge in sins at will, thinking that they will be forgiven anyhow. In this Ramadan, there are likely to be five Fridays or days of ‘Jummah’ (Assembly).