Since I am not a member of any of those organizations, do not claim to be a Protestant and in no way support the doctrines of Martin Luther, you have just shown the world your lack of knowledge of the New Testament Church.
The Church at Pentecost recognized the Feast Days and Sabbaths outlined in the book of Leviticus (Chapter 23). They did not celebrate the pagan Easter morning affair that the "Universal" church began. They continued to celebrate the Passover...and continue to do so, today.
Are these Sabbaths and Feast Days celebrated by the Mormons, the Jehovah Witnesses or the Protestants? Not the last time I looked. We know they are not celebrated by the "Universal" Church because that outfit was the first to go into apostasy....1700 years ago.
If you want to know more about my faith....start at Genesis and work your way forward. Examine the history of your organization and you'll soon see where they left the faith.
In a previous post you claimed that you were a member of the Church of God. The Churches of God that I am familiar with came out of the Restoration Movement, along with a bunch of others also including Christian Science.
Now you belong to a New Testament Church. According to NewTestamentChurch.com (unless you happen to change allegiances again before your next post), they start new churches and give instructions on how to do so. According to any of the Bibles I have read, this is what we engineers call a really bad thing. For those who follow the Lord Jesus Christ, being a member of His Church oughta be enough.
Furthermore, it says that there is no distinction between clergy and laity. So, in other words anyone with charisma and a lust for leadership can lead a church (shades of Ted Haggard). It also says that the New Testament era churches were led by elders and not by Pastors. True enough, except for the fact that church authorities (Peter, Paul, Timothy, etc.) came and imposed their own authority upon them. They were not autonomous. Church officials told them what to do and what not to do. And so on.
I have seen various new fads and new names and new approaches over my years and the Church has seen them throughout the last 2000 years. At what point do people just discard their hubris and their pride and their love of power and go back to what the Lord Jesus Christ left for us to follow? When do we leave the Jim Bakkers and the Jimmy Swaggarts behind?