That anniversary was part of the Mosaic Law, and we are not under the Law. Rather, we hold dear another event, the death of God’s Son.
إِنَّ ٱلْمَسِيحِيِّينَ ٱلْحَقِيقِيِّينَ لَا يَحْتَفِلُونَ بِٱلْفِصْحِ ٱلْيَهُودِيِّ .‏