Friday is sacred for Muslims because,
Muslims believe: the prophet muhammed (pbuh) said: "the best day on which the sun rises is Friday.On it Adam was created,on it he was expelled (from paradise), on it his repetance was accepted, on it he died and on it the Last Hour will take place." i hope this helps answer your question.
Friday
A holy day for rest and worship is Friday for the Muslims, Saturday for the Jews and Sunday for the Christians
Muslims do not have holy day weekly. but i think what your asking is the Friday prayer, just like christens go to church on Sunday, without any invitation's, Muslims go to on Friday, Friday was the original day for christens as well, but they changed it to Sunday.
Muslims must pray 5 times a day, mostly congregational. However, their holy/gathering day is Friday.
Muslim are obligated to pray 5 times EVERY DAY. It is a pillar in Islam! there holy day is Friday
Friday, for Muslims, is a holiday. All Islamic countries (at least the Middle Eastern ones) take Friday off. Every Friday there is a Jumaa. The Imam gives a Khutba and anyone who attends it from the beginning is attending salat duhr. After the Khutba, they pray 2 rakaas for the duhr.Also, the Prophet pbuh prayed at the mosque on Fridays. Truthfully, a man should be praying all his prayers at the Masjid. That is including the Fajr.
Friday is our weekly holy day (We call it 'Jummah') Eid Al Fitr (1 day) and Eid Al Adha (3 days) are our celebrations. And finally the holy month of Ramadan, in which muslims fast from sunrise to sunset.
Friday
Friday
Friday is their day of worship.
The day after Good Friday is called Holy Saturday.
Holy Saturday is celebrated the day after Good Friday.