The Memorial is the Observance of the death of Jesus Christ

If you are a Bible reader, did you notice when Jesus first instituted
the that Observance? It was on the Passover. That makes it easy to
understand when and how often it should be celebrated.
Christ instituted the Lord’s Evening Meal and was unjustly put to death on Passover Day.
Held only once a year, on Nisan 14, the Passover commemorated Israel’s deliverance from Egyptian bondage.
So the death of “Christ our passover” should be memorialized only once each year,
not weekly or daily. (1 Corinthians 5:7) In observing the Lord’s Evening Meal,
Christians follow the same procedure as Jesus did when he instituted it.