Jumma prayer of the Qur'an is any day of gathering when the people are all called to discuss important issues.
Normally the officers of the state will run things but when necessary everyone is called so that a consensus can be reached, though the decisions must be in accordance with the principles of the Qur'an and bearing in mind that the majority are not always right.
The Friday jumma prayer is nothing but a failed copying of the Jewish sabbath, no work, and the Christian Sunday, originally no work as well. To make it a day of prayer where you learn and do nothing constructive for yourself or society is religious nonsense in a nutshell.
The Mulla wants us to deny this world for the hereafter but please donate generously so he can live off your earnings in this one!
16:12 He has committed to your service the night and the day, as well as the sun and the moon. And the stars are committed by His command. These are sufficient signs for people who use their intellect.
16:13 And all that He has created for you on earth is of diverse colors and qualities. Therein is a message for people who would reflect (and study the Book of Nature).
55:16 Then, O Men and women! Which authority of your Lord will you deny?
When will they learn!