Nowadays, during the Nativity Fast, Thessaloniki has been transformed into a hub of 40 Days Liturgy, and I have been giving names of Living and Departed from all over the world. What is the power of 40 Day Liturgy? This testimony by Metropolitan of Morfou, Neofytos is worthy of heed:

“I told a certain priest, who serves in a community with few residents, to start celebrating the 40 Days Liturgy for the Nativity Fast.
And the good priest told me:
-But, Your Holiness, our village has few residents, we don’t even have regular chanters,
how will I celebrate the 40 Days Liturgy?
-Get a woman, I tell him, to say “Kyrie eleison”, “Amen”, “Grant this, O Lord” …
This priest actually celebrating 40 Days Liturgy for the Nativity Fast 4 years ago.
In the third year, during Christmas, he came moved and told me:
“I thank you for having me celebrate 40 Days Liturgy, because you became the occasion for me for the Divine Liturgy to be not simply an “auditory experience”, (he also found chanters), not only for us to read prayers (a reading experience), but it also became a visible one. I saw it with my own eyes!
—Lord have mercy, I told him.
What did you see?
And he said to me:
-This morning I mentioned 2,000 names in the Office of Oblation (Proskomide) * When, furing the Divine Liturgy, I exclaimed “Especially for our most holy, pure, blessed, and glorious Lady, the Theotokos and ever-virgin Mary”, and the chanter outisde began to sing “It is truly meet to bless you, O Theotokos, ever-blessed and most pure, and the Mother of our God. More honorable than the Cherubim, and more glorious beyond compare than the Seraphim, without defilement you gave birth to God the Word. True Theotokos we magnify you!”, the altar, which you know is very small, began to open up, until it became a huge stadium steps.
On it I saw standing all those whom I had mentioned in the Prothesis. There were also people whom I had buried in recent years, but also people from
other villages, whom I knew and have in my diptychs. Indeed, I also saw the mood of each one. Sometimes I saw someone bright, sometimes sad, sometimes black, sometimes gray.
There was also this one, who had died of cancer at a very young age a few years ago, and he shone so much that he spread light to those around him.
Addressing all those I saw, I said to them in a low voice so that the chanter outside would not hear:
-What do you want?
And they all bowed slightly and said to me:
-We thank you, Father, and they left.

This is the power of the 40 Days Liturgy!

* The Office of Oblation (Proskomide) has been a service of offering gifts to God in preparation for the Sacrament of Holy Eucharist or Holy Communion in the Divine Liturgy. The Office of Oblation is thus a prerequisite for the Divine Liturgy. Today, the priest conducts the Office of Oblation inaudibly during Matins behind the Altar Iconostasis (Icon Screen).