And the answers and specific quotes and citations are here on the thread. Again, you are invited to actually read it; why should I repeat myself just because you arrived late to the party?
Polycrates of Ephesus who lived in the second century was the Bishop of Ephesus....as had been seven other members of his family. He speaks of the celebration of Passover on the fourteenth of Nisan/Abib as the proper time of this Festive celebration ordained by the Lord in Leviticus 23.
He was acquainted with Polycarp, Bishop of Smyrna and disciple of the Apostle John, who also both kept the Passover on the fourteenth day of the first month as well. In addition to these folks he made mention of the Apostle Phillip and his daughters keeping the feast of Passover too.
Don't you think it odd that these Apostles and other early Christians would be celebrating Passover (on the Fourteenth) well in to the second century.....if the Apostle Paul, as you have indicated, did not actually recommend this and had something else in mind......?????
The Catholic Church finally put it's foot down and said NO MORE PASSOVER. They did this in the fourth century at the Council of Antioch (341 A.D.) as many Christians were still celebrating the Passover as had all the Apostles, including Paul. They did this in their attempt to remove all "Jewishness" from the Church.....much as you are doing.