Complex sentence: The Divine Liturgy is not celebrated on weekdays during Great Lent, and in some places during the lesser fasting seasons either; however, reserve communion is prepared on Sundays and is distributed during the week at the Liturgy of the Presanctified Gifts.
Split into simpler sentences: The Divine Liturgy is not celebrated on weekdays during the preparatory season of Great Lent and in some places during the lesser fasting seasons either. Reserve communion is prepared on Sundays and is distributed during the week at the Liturgy of the Presanctified Gifts.