In the Russian Orthodox tradition, near the end of Matins around midnight on Pascha, the people and the priest process around the church outside singing the Pascha Sticherion:
"Thy Resurrection, O Christ Our Savior,
the Angels in Heaven sing.
Enable us on Earth to Glorify Thee in Purity of Heart."
This is one of my favorite memories, and I look forward to processing around the church each year as we sing with the Angels in Heaven. Then everyone proceeds back into the Church where Matins ends and the Divine Liturgy begins with the singing of "Christ is Risen," which is another of my favorite hymns.
I do not remember what the Greek Orthodox Tradition is.
Would anyone like to share?