No this is not a Christian feast this is Yahweh's feast "The Passover" remembering the Exodus and that wonderful night when Yahweh passed over the Hebrews who had the blood on their doorpost. Paul is referring to the same feast in Lev 23 THE PASSOVER as with that meal they ate unleavened bread which is also in sync with the Feast of Unleavened Bread.
Sadly at this time I have had to put you on ignore so I won't see anymore of your post, as your religious rhetoric is lies and blasphemy. We are to call no one father! None of the popes have any Biblical authority and are not Yahweh's representatives on earth. They like the rest of us are only mere men. Only one, Yahweh the God of Abraham, Isaac and Jacob. The God of Israel, should be lifted up and glorified and He does not share His glory with no man. The Catholic religion of man is exactly that a religious institution of man. Its doctrines are man made and pretty much go against everything the Bible teaches from the beginning.
They even testify in their own charter that Saturday is the Biblical Sabbath and even mock those who think that Sunday is the Biblical Sabbath. Meaning they were having a go at protestants thinking that they were keeping the Sabbath on a Sunday. Quite an irony isn't it. The amazing thing also is that the 1st Protestants were still catholics as they were "protesting catholics" hence were we get the English word to protest, this is the etymology. They were from the same church. If only more people would understand the history and roots of their church denominations they may start thinking twice about what they are doing.
As for me and my house we will serve Yahweh from what the scriptures say. As they did in the days of our Messiah Yeshua, there was no catholic, no pope. Not from any man made religious system. There were only man and women filled with and led by the Holy Spirit preaching the scriptures only. They were not under any denominational banner. They were the Called out ones. They were known as being "Of the Way" which in its setting at the time was thought of as an arm of Judaism, but without all of the Jewish man made traditions. That doesn't mean abolishing law. That means not doing the traditions of the elders their man made laws like washing hands in a certain way etc. Which the law does not teach to do!!! Most people in my experience do not even know or understand what the laws are.
Shalom
The old is only types and figures shadows
Heb 8:5 Who serve unto the example and shadow of heavenly things, as Moses was admonished of God when he was about to make the tabernacle: for, See, saith he, that thou make all things according to the pattern shewed to thee in the mount.
6 But now hath he obtained a more excellent ministry, by how much also he is the mediator of a better covenant, which was established upon better promises.
Heb 9:1 Then verily the first covenant had also ordinances of divine service, and a worldly sanctuary.
2 For there was a tabernacle made; the first, wherein was the candlestick, and the table, and the shewbread; which is called the sanctuary.
3 And after the second veil, the tabernacle which is called the Holiest of all;
4 Which had the golden censer, and the ark of the covenant overlaid round about with gold, wherein was the golden pot that had manna, and Aaron's rod that budded, and the tables of the covenant;
5 And over it the cherubims of glory shadowing the mercyseat; of which we cannot now speak particularly.
6 Now when these things were thus ordained, the priests went always into the first tabernacle, accomplishing the service of God.
7 But into the second went the high priest alone once every year, not without blood, which he offered for himself, and for the errors of the people:
8 The Holy Ghost this signifying, that the way into the holiest of all was not yet made manifest, while as the first tabernacle was yet standing:
9 Which was a figure for the time then present, in which were offered both gifts and sacrifices, that could not make him that did the service perfect, as pertaining to the conscience;
Heb 10:1 For the law having a shadow of good things to come, and not the very image of the things, can never with those sacrifices which they offered year by year continually make the comers thereunto perfect.
