In the Ordinary Form of the Roman Rite, Easter is one of two solemnities with octaves, the other is Christmas.
[2] The paschal sequence Victimae paschali laudes may be sung before the gospel reading on each of these days.
The Gospel readings for each of middle days within the octave are taken from the various Scriptural accounts of the Resurrection of Jesus.
The Lutheran Missal states:[3] The Octave of Easter forms a cohesive thematic unit with the two following weeks.
The Gospel for Quasimodogeniti, the First Sunday after Easter, recounts the appearance of Our Lord to the apostles in the locked upper room, together with Thomas’ confession.