And I've pointed out to you how the sacrifies, Levitical priesthood, and holy days were inseparably linked in Leviticus 23, to which you have yet to respond.
Your ersatz holy days to not meet the biblical test. They are pure human tradition. They pretend to honor God. They evidence a zeal without knowledge. They violate Deut. 12:32.
You're stated that they were inexorably linked, but shown me no evidence. I've shown you evidence in scripture where the holy days were being celebrated without the Levitical priesthood and I've shown you where they are unlinked in Hebrews. Your argument is really with the book of Hebrews and/or Paul of Tarsus.
Last word on this particular subject is yours if you want it.