The eucharistic Divine Liturgy is not celebrated in the Orthodox Church on Lenten weekdays. In order for the faithful to sustain their Lenten effort by participation in Holy Communion, the Liturgy of the Presanctified Gifts is served.
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.
The Liturgy of the Presanctified Gifts is served on Wednesday and Friday evenings, although some churches may celebrate it only on one of these days. It comes in the evening after a day of spiritual preparation and total abstinence. The faithful who are unable to make the effort of total fasting because of weakness or work, however, normally eat a light Lenten meal in the early morning.