It seems that you are confusing the Church’s celebration of the Pascha with Eucharist. Yes, the Eucharist is inextricably connected with the Pascha, but the celebration of it occurred as often as a valid celebration could be held, and eventually, daily.
The Pascha or Passover is an OT festival which foreshadows the sacrifice and death of Christ. Your church, technically, does not celebrate this festival because it does not recognize the continuation of this festival in the NT times. What it celebrates is Easter (from “Estre” a pagan goddess), a festival commemorating the resurrection of Christ from the dead.
The problem is that your church says Easter is a celebration of the Pascha to commemorate the resurrection. But the Passover is not a celebration of Christ’s resurrection, but of His death! Then the Lord’s Supper/Eucharist, which should have been the one called the Pascha because it involves Christ’s sacrifice, is made distinct from the Pasch. The reason why is because your church does not believe it was the Passover [or Pascha] that Jesus was having with His disciples on the eve of His death.
This view is seen in the Origen’s comment when he said, “Observe that in the law we never find it said, ‘Your passover;’ but in all the passages quoted the phrase occurs once without any adjunct, while we have three times ‘The passover of the Lord.’ To make sure that there is such a distinction between the passover of the Lord and the passover of the Jews…” (The Ante-Nicene Fathers, Vol.IX, p.388).
Origen’s use of the terms “passover of the Lord” and “passover of the Jews” to distinguish between the OT Passover and the Lord’s Supper is a clear indication of the Gentile churches’ anti-Jewish sentiments that eventually led to the change in the celebration of the true Pascha, and the abrogation of anything “Jewish,” like the weekly Sabbath and the annual Holy Days.
What I have shown so far in my posts is that the churches used to celebrate the Pascha on the 14th of Nisan using the bread and wine following the example of the apostles. But later on some of the churches which were celebrating the resurrection every week incorporated the partaking of the bread and wine [which they call “the sacred mystery”] into the celebration. These weekly celebrations occurred on the Sabbath because they then believed the resurrection happened on a Sabbath.
But Alexandria and Rome introduced more innovations to the celebration of the Pascha. Rome established Easter as the Pascha but it was now to celebrate the resurrection, not the “sacred mysteries” or the Eucharist/Lord’s Supper. According to the historian Baur, it was due to Rome’s emphasis on liturgical form that they regulated the Passover with reference to the day of the resurrection (
The Church History of the First Three Centuries, Vol. II, p.283). The West emphasized the resurrection, with its Friday crucifixion and Sunday resurrection tradition, while the Eastern church emphasized the crucifixion as the significant meaning. This, as Baur says, made the Western viewpoint subjective, while the Eastern viewpoint was objective and dogmatic (Vol. I, p.167).
As for the Lord’s Supper, the historian Harnack tells us that the Alexandrians saw here, as in everything else [because of their pagan background], the mystery behind the mystery; and while they accommodated the church, they wished to be continually nourished by a perpetual Eucharist. As Harnack says, everywhere the service was departing from its original significance (
Outline of the history of Dogma, p. 115). This explains why the Eucharist was eventually celebrated daily.
This problem of theological difference arose because of the opposition Gentile Christians had toward Jewish Christianity. The historian Neander says it was opposition to Judaism that led to the special observance of Sunday in place of the Sabbath, because the Sabbath was regarded as representing Judaism. And it was the same opposition to Judaism that led to the setting aside Saturday as a fast day (
History of the Planting and Training of the Christian Church by the Apostles, Vol. I, pp.295-296).
This same anti-Jewish feeling, according to Baur, expressed itself in the Council of Nicea’s declaration (325 A.D.), which rejected the 14th day Passover and forced conformity to the Roman Church’s observance of Easter Sunday (Vol. I, pp. 172-173).
The historian Arthur Stanley, in his work
Lectures on the History of the Eastern Church, confirms this view when he says that the Passover controversy represented the struggle between the historical, apostolic tradition and the new Christian Catholic spirit which was striving to separate itself from its Jewish birthplace. The justification given for the change was that Christians should not keep the Passover” …
on the same day as was kept by the wicked race that put the Savior to death” – observance of that day was, by then, viewed by many as an impious absurdity (p.154-155).
Harnack states that the new law concept in the Roman Church was not Jewish, but rather anti-Jewish, which at the same time left room for the slipping-in of Old Testament commandments into the church (pp. 75-76).
So here we see how and why the Passover celebration [the Pascha], originally held every 14th of Nisan by the primitive Church, became a festival called Easter; how and why the Lord’s Supper which was supposed to be the theme of the NT Passover became a separate celebration called the Eucharist; and how and why the Lord’s Supper evolved into a daily celebration from one held annually on the eve of the Pasch.