God told ancient Israel to not add to or take away anything from His Laws (Dt 12:32). The Apostle John stated that anyone who removes any teachings from "this book" would have their name removed from the Book of Life (Rev 22:19)! These are pretty serious words!
So, why do so many today try to convince others that "The Law has been done away!" or that "The Law has been nailed to the cross!"?
However, Jesus said:
17 Think not that I am come to destroy the law, or the prophets: I am not come to destroy, but to fulfil.
18 For verily I say unto you, Till heaven and earth pass, one jot or one tittle shall in no wise pass from the law, till all be fulfilled.~ Mt 5:17-18
So, claims of modern mainstream Christianity that we are now exempt from keeping God's Law ring hollow and make one wonder Have Christians as a Whole Left Behind the Teachings of Christ?
This should lead one to consider several things:
1. Should a Christian keep the holy days or holidays?
2. When is the start of the new year?
3. Is there a biblical calendar?
4. What are the feast days God commands us to keep?
5. What is the Meaning of God's Holy Days?