The Bible says remember the Sabbath day to keep it Holy. Exodus 20:8.
In the video above a Catholic Bishop says the biblical day of worship was changed from Saturday to Sunday by the Roman Catholic Church in the year 336 AD.
The Bishop goes on to say that he has offered $1,000 to anyone who can show him where it says in the Bible that Sunday, the first day of the week, is the Sabbath day. No one has ever been able to claim his $1,000 offer.
The only church denominations who worship on Saturday that we know of are the Seventh-day Adventists and the Seventh-day Baptists.
Jews say the seventh day is the day of worship but many of them worship on Friday night so Jewish business owners won’t need to close their businesses on Saturday.
...hat tip to Phil Miller for the link to this video via a recent Facebook post.