As far as I know, God did not suggest we should stop holding the high feast days as holy when the prophecy was fulfilled. If you have biblical evidence for why we should, please reference.
Get rid of the old yeast, so that you may be a new unleavened batch — as you really are. For Christ, our Passover lamb, has been sacrificed. Therefore let us keep the Festival, not with the old bread leavened with malice and wickedness, but with the unleavened bread of sincerity and truth. - 1 Corinthians 5:7-8
So, my brothers and sisters, you also died to the law through the body of Christ, that you might belong to another, to him who was raised from the dead, in order that we might bear fruit for God. - Romans 7:4
Basically interpreted as Easter and Passover overlap (because the last supper was Passover) but, Good Friday, and Easter Sunday became the focus of the church. Because gentiles became the predominant group, Easter became the focal point of time.
So, my brothers and sisters, you also died to the law through the body of Christ, that you might belong to another, to him who was raised from the dead, in order that we might bear fruit for God. - Romans 7:4
Basically interpreted as Easter and Passover overlap (because the last supper was Passover) but, Good Friday, and Easter Sunday became the focus of the church. Because gentiles became the predominant group, Easter became the focal point of time.