If you knew a little more about the Bible, you would know that Paul was telling the Colossians to not let people judge them because they ARE keeping God's dietary laws and appointed holy days. You were tricked into thinking it means the opposite.
Almighty God has shown in Scripture what His real Holy Days are. You do what you want.
Actually it does mean the opposite,do not let any man judge you and tell you to keep them.
Col 2:14 Blotting out the handwriting of ordinances that was against us, which was contrary to us, and took it out of the way, nailing it to his cross;
The Bible says that Jesus took the physical ordinances of Israel,and nailed them to His cross,taking them out of the way,for those physical ordinances were against us,they were against us in having a spiritual relationship to God,and access to heaven.
Jesus got rid of the physical ordinances,and holy days,of Israel.
Col 2:15 And having spoiled principalities and powers, he made a shew of them openly, triumphing over them in it.
Col 2:16 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:
Jesus got rid of them,physical ordinances,holy days,so it can only mean let no man judge you,and tell you to keep them,because we do not have to go by them anymore,and if someone thinks we do,then they are going against the scripture that we are not saved by works,by believing we still have to do works of the Old Testament.
Col 2:17 Which are a shadow of things to come; but the body is of Christ.
This scripture also backs it up by saying those things in the Old Testament were only a shadow of things to come,which means they were only temporary,but the body is of Christ,which means it is spiritual now,and when you belong to Christ you no longer go by them,why,because Christ got rid of them.
But this will prove a point that even though the Bible says plainly,all up in your face,without a doubt,that Jesus got rid of them,so we do not go by them,some people will still not change their position,why,because 99.99 percent only go by their denomination,or what they personally believe,and once it gets stuck in the ole' noggin,it is hard to unloose.