Let no man therefore judge you in meat, or in drink, or in respect of an holyday, or of the new moon, or of the sabbath days: Which are a shadow of things to come; but the body is of Christ. Col 2:16
If you read in context, Shaul is telling the believers to not let people judge them because THEY ARE observing God's commandments, not the other way around. Back up to verse 8 and dig out the context.
Beware lest any man spoil you through philosophy and vain deceit, after the tradition of men, after the rudiments of the world, and not after Christ.
Colossians 2:8 (KJV)
God's commandments are not "the philosophy of men", and "vain deceit" or "the rudiments of the world"
but rather be like Christ, "after Christ", meaning to obey the Father's commandments, just like He did!!!!