I see what you have done. You have taken a marker and crossed out those portions of Lev. 23 that do not fit with modern ersatz messianic practices. You have used your traditions and made the word of God fit it.
My question to you was, where specifically did God tell folks to continue to "observe" these holy days without the sacrifices, the physical tabernacle/temple, and the Levitical priesthood, etc?
If you are going to appeal to the establishment of the Lord's Supper, then you have to additionally prove that all the holy days are included under the extreme modifications to thew Passover which culminated in the simplicity of the Lord's Supper. We are to remember Christ's death through the instruments of bread and wine representing His body and blood. And we are to do it "often", not yearly as was the Passover (1 Cor. 11:26).
Hebrews does not says that only a portions of the Levitical system passed away, and we get to keep the ones we want. Hebrews says that it all was decaying and about to pass away (Heb. 8:13).
The fact remains that whatever you do with the old covenant holy days, you are clearly in violation of Deut. 12:32.
You've got it backwards. Where in scripture does it say that the feasts of the Lord, our God, our saviour, are not to be observed? The unmistakeable instructions to Christian believers in Hebrews, a holy book of the holy bible, are that animal sacrifices and offerings and the Levitical priesthood are no longer needed with the death of Christ on the cross. It does NOT say that we should no longer observe the feasts of the Lord.
Paul himself does not agree with you. Paul, apostle of the Lord, said to residents of Ephesus:
Act 18:21 But bade them farewell, saying, I must by all means keep this feast that cometh in Jerusalem: but I will return again unto you, if God will. And he sailed from Ephesus.
Paul, to whom Jesus Christ revealed himself, says of the feast of unleavened bread:
1Co 5:8 Therefore let us keep the feast, not with old leaven, neither with the leaven of malice and wickedness; but with the unleavened bread of sincerity and truth.
Therefore, let us, Christians, KEEP THE FEAST. Paul certainly didn't have the same understanding you did. Paul certainly didn't believe that the Levitical system was needed for Christians to KEEP THE FEAST. Paul didn't think that animals sacrifices were needed to KEEP THE FEAST.
I can believe you and your tradition, or I can believe Paul and scripture. I chose Paul and scripture.