We keep Passover through the Lord's Supper once a year.

1Co 5:7  Purge out therefore the old leaven, that ye may be a new lump, as ye are unleavened. For even Christ our passover is sacrificed for us:

1Co 5:8  Therefore let us keep the feast, not with old leaven, neither with the leaven of malice and wickedness; but with the unleavened bread of sincerity and truth.

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.

Harold