@Ziggy Seems to be referring to the Lord's Supper. In Luke 22, the last passover becomes the first Lord's Supper.
1Co 11:18 For first of all, when ye come together in the church, I hear that there be divisions among you; and I partly believe it.
1Co 11:19 For there must be also heresies among you, that they which are approved may be made manifest among you.
1Co 11:20 When ye come together therefore into one place, this is not to eat the Lord's supper.
1Co 11:23 For I have received of the Lord that which also I delivered unto you, That the Lord Jesus the same night in which he was betrayed took bread:
1Co 11:24 And when he had given thanks, he brake it, and said, Take, eat: this is my body, which is broken for you: this do in remembrance of me.
1Co 11:25 After the same manner also he took the cup, when he had supped, saying, This cup is the new testament in my blood: this do ye, as oft as ye drink it, in remembrance of me.
1Co 11:26 For as often as ye eat this bread, and drink this cup, ye do shew the Lord's death till he come.
The night Jesus was betrayed was Passover.
Am I missing something?
HUGS