It depends on each church.
It was common that each church would do:
Now you can find Sunday, Tuesday, and Thursday. Or Sunday and any day of the week.
A church that I use to attend was as follows:
Sunday
8:00- prayer
9:00- first service
11:00- second service
4:00- third service
7:00- fouth service
Monday- Friday
6 am- early prayer
Mon. Night
7- youth
Tues. Night
6- youth
7- bible study
Wed. Night
6- prayer
Saturday
11 am- Prayer
It depends on each church.
Sunday is the day to worship God. You should really worship God all days of the week.
You can worship God any day of the week and it will still Sabbath. Sunday is the day that people go to church.
Monday
Monday,may be.
Muslims do not worship a certain day of the week as they only acknowledge an extemporaneous God. As for the days upon which a Muslim will worship, Muslims worship every day on the week, but have an extended communal prayer on Friday Afternoon.
Christians worship on Sunday, the first day of the week. Synagogues are normally open on the Sabbath or seventh day of the week (between sunset Friday and sunset Saturday). Most Christians would not worship in a synagogue.
Sunday is the day of rest in most western countries, it is a day of worship as Sunday is the Lord's day.
May be the roman catholic church decided to keep the first day of the week for a service.
Both claim to have begun in the year 33 AD on the Day of Pentecost.The Eastern Orthodox Church or, more correctly, the Catholic Orthodox Church, is known as Apostolic Succession.Some Pentecostals call themselves Apostolic. The main distinction is their emphasis on the baptism of the Holy Ghost with "speaking in tongues" The Orthodox Church believes that there is no Biblical foundation for this.Another difference is that Eastern Orthodox is trinitarian, while Apostolic Pentecostals are oneness believers.
Sunday is the day in which people attend Church. This is in commemoration of when He Rose from the Dead (the first day of the week).
The Shabbat, from Friday sundown until Saturday after twilight.
Monday is the first day of the week. Tuesday is the day after the first day of the week. Wednesday is the day in the middle of the week. Friday is Friday Night; the start of the weekend. Saturday is the second day of the weekend. Sunday is "God" worship day. So, this makes Thursday "That" day.