Q: For Easter Sunday, should the Sprinkling Rite take place after the Renewal of Baptismal Promises which is after the Homily in the place of the Creed? Or is it during the place of the Penitential Act before the Gloria? I always get confused, I know Sundays after Resurrection Sunday (Easter) the Sprinkling Rite takes place of the Penitential Act before the Gloria, but on Easter would the Sprinkling be after the Renewal of Baptismal Promises? Also, can we or do we sing the Lord, Have Mercy (Kyrie Eleison) on and throughout Easter?
A: The renewal of baptismal promises is optional on Easter Sunday. If you do it, you should probably not do the blessing and sprinkling of water at the beginning of mass, and save the sprinkling for later. The sprinkling rite is optional – never obligatory – to replace the penitential act, even during Easter Time. It is especially appropriate to sprinkle during Easter, but not required.
You may sing the Lord, Have Mercy (Kyrie) on any day that the liturgy calls for it, even during Easter Time. But if you use the sprinkling at the beginning, then there is no Lord, Have Mercy.