Often, when trying to prove a false teaching that the Sabbaths have been done away with, christians will quote Colossians 2:16-17, as if anything in that passage even remotely suggests that Yah’s Sabbaths were somehow ended because the law was fulfilled, and the real substance of the law was made available to all mankind (not just the physical Jews) on the Feast of Weeks (Acts 2).
Let me explain Colossians 2:16-17 within the context of what Paul is saying.
In Leviticus 11, the law mandated exactly HOW (details) the physical Jews were to eat. Now, the penalty and perfection (details) of the law having been nailed to the tree, eating was not done away with, but the details about HOW one had to eat were abolished.
In Leviticus 15, the law mandated exactly HOW (details) the physical Jews were to have spousal intimate relations. Now, the penalty and perfection (details) of the law having been nailed to the tree, having marital sex was not done away with, but the details about HOW spouses had to have sex were abolished.
The law detailed exactly HOW (details) the Sabbaths (weekly and feasts) were to be observed. Now, the penalty and perfection (details) of the law having been nailed to the tree, it wasn’t the Sabbaths that were done away with, but the mandates concerning HOW they were to be observed.
One can no more abolish Yah’s Sabbaths than he can abolish eating and sex. But, Yah’s true children are not under any rules and regulations regarding HOW any of those things are to be done.
So, Paul says that we are not to judge one another in food or drink (the details of Leviticus 11), but he never said that eating and drinking were abolished. Then he goes on to say that Yah’s children are not to judge one another in how (details) each chooses to observe what? Feasts, new moons, and Sabbath days. Those are all tied to the Sabbath system (the body of it).
The fulfillment of the law did not abolish eating, drinking, marital sex, or honoring Yah’s Sabbaths. It just no longer mandated the intricate details in HOW those things are to be done. And why? It’s because the entire body of the Sabbaths (the whole system) is ABOUT Messiah, and is prophetic.
For more information: What Are the Old and New Covenants?