God's seven Holy Days (found in Leviticus 23) foreshadow His plan of salvation for mankind. Four of the events that the Holy Days foreshadow have not yet occurred. They are, briefly: a)the return of Christ/ harvest of the firstfruits (Feast of Trumpets), b)the binding of Satan for 1000 years (the Day of Atonement), c)the millennial reign of Christ (the Feast of Tabernacles), and d)the greatest harvest/opportunity of salvation (the Great Last Day).
Lampstand,
This is hardly a new misconception, in reality it's something the church has been dealing with its entire life. As Paul made his missionary journeys around the ancient world, preaching freedom from the Law of Moses, a group of ex-pharisees (known loosely as the Judaisers) would follow a few days behind him, preaching that Gentiles had to become Jews before they could become Christians. This teaching included circumcision, a kosher lifestyle, and generally following Mosaic Law. When Peter heard of this, he came before the Christian sect of the Pharisees, saying:
Acts 15:7-11 8 And God, Who is acquainted with and understands the heart, bore witness to them, giving them the Holy Spirit as He also did to us;
9 And He made no difference between us and them, but cleansed their hearts by faith by a strong and welcome conviction that Jesus is the Messiah, through Whom we obtain eternal salvation in the kingdom of God).
10 Now then, why do you try to test God by putting a yoke on the necks of the disciples, such as neither our forefathers nor we [ourselves] were able to endure?
11 But we believe that we are saved through the grace (the undeserved favor and mercy) of the Lord Jesus, just as they [are].
The Mosaic law was difficult to follow to the letter. Many times, however, these difficulties arose from how the Pharisees and Saducees interpreted the law. These men were not only the Clergy, but also the Legislative, Executive, and on occasion the Judicial branches of their entire political system. If someone wanted to know if it was kosher to tie a certain type of knot on a certain day, they'd ask one of them (they're also referred to as Lawyers). If someone had a complaint against his neighbor, they'd bring it up with them. This eventually led to a very large, complex system which (by Peter's own admission) was impossible to follow.
Paul says "For by grace you have been saved through faith; and that not of yourselves, it is the gift of God; not of works, so that no one may boast". Salvation comes by grace, not by works. If we could somehow earn our way into heaven by doing enough good deeds, shying away from the bad deeds, there wouldn't be any need for Grace. Paul addresses this issue in his letter to the church in Rome: "For all have sinned and fallen short of the glory of God", continuing "For the wages of sin is death, but the free gift of God is eternal life in Christ Jesus our Lord". Now, don't hear me wrong: works are an important part of faith (James even goes so far as to say 'Faith without works is dead'), but it's the Faith that leads to eternal life. Consequently, anyone preaching salvation by way of works (salvation by Mosaic Law, salvation by indulgences, salvation by baptism, etc) is falling into the same trap many pharisees fell into thousands of years ago.
Paul continues: "If you are led by the Spirit, you are not under the Law.", "Therefore no one is to act as your judge in regard to food or drink or in respect to a festival or a new moon or a sabbath day -- things that are a mere shadow of what is to come", and "For sin shall not be master over you, for you are not under Law but under grace". Keep in mind who Paul's talking to: young churches, mostly of a Jewish background. When he speaks of "the Law", he's referring to Mosaic Law. When he speaks of "the law", he referrs to state law. (I say this so nobody thinks I'm claiming Paul says to disobey all laws.). Jesus clearly states in the the Gospel of Matthew that He came not to abolish the law, but to fulfil it. He didn't destroy the Law of Moses, he completed it. He fulfilled the prophesies of the coming messiah, He became the very essence of the suffering servant, (foreshadowed here, here, and here; reinforced here and here.)
So what laws do apply to christians?
Matthew 22:37-40 37 And He replied to him, You shall love the Lord your God with all your heart and with all your soul and with all your mind (intellect).
38 This is the great (most important, principal) and first commandment.
39 And a second is like it: You shall love your neighbor as [you do] yourself.
40 These two commandments [a]sum up and upon them depend all the Law and the Prophets.
In short, everything comes from love,the love from Christ.