The Liturgy of the Presanctified Gifts is an evening service. It is the solemn lenten Vespers with the administration of Holy Communion added to it. There is no consecration of the eucharistic gifts at the presanctified liturgy. Holy Communion is given from the eucharistic gifts sanctified on the previous Sunday at the celebration of the Divine Liturgy, unless, of course, the feast of the Annunciation should intervene; hence its name of “presanctified.”

https://oca.org/orthodoxy/the-orthodox-faith/worship/the-church-year/liturgy-of-the-presanctified-gifts