Easter Triduum and Season

The summit of the Liturgical Year is the Easter Triduum—from the evening of Holy Thursday to the evening of Easter Sunday. Though chronologically three days, they are liturgically one day unfolding for us the unity of Christ's Paschal Mystery. The single celebration of the Triduum marks the end of the Lenten season, and leads to the Mass of the Resurrection of the Lord at the Easter Vigil. The liturgical services that take place during the Triduum are Mass of the Lord's Supper, Good Friday of the Lord's Passion and Mass of the Resurrection of the Lord. The Easter Triduum begins with the evening Mass of the Lord’s Supper on Holy Thursday, reaches its high point in the Easter Vigil, and closes with Evening Prayer on Easter Sunday. (courtesy of the USCCB website).

The Octave of Easter is an 8 day long solemnity which begins with Easter Sunday and concludes with the Second Sunday of Easter, now universally known as Divine Mercy Sunday.

Following the Easter Octave the Church celebrates the Resurrection through the Solemnity of Lord's Ascension.