Notwithstanding the absurdities being put to you on this thread, I bet you celebrate Easter, which commemorates the Resurrection of Christ—the Second Person of the Holy Trinity.
Of course I do, because that is the culmination of Jesus's Life here on Earth. He came to bring us redemption, if we choose to accept it.
With the readings in the Liturgy, leading up to Easter, we Catholics hear of the Passover celebration of our older brothers in the Lord, because Jesus celebrated it the night before He died.
Any Catholic who attends a Passover Seder with Jewish friends will recognize it in the Scriptures of Holy Thursday. And the prayers the priest says during the Offertory in the Mass, come straight from the Seder.
Folks not familiar with Catholicism seem to think the Church Fathers made up the prayers and celebrations out of whole cloth, and that could not be further from the truth. We knew about these celebrations, because they were brought down to us from the Apostles, who were, after all, faithful Jews, before they were chosen by Christ to lead His Church.