And to the angel of the congregation in Philadelphia write -- These things says He that is holy, He that is true, He that has the Key of David, He that opens, and no man shuts, and shuts, and no man opens. I know your works: behold, I have set before you an open door, and no man can shut it: for you have a little strength, and have kept My Word, and have not denied My Name . . ."
Disclaimer: While this article makes some good points, Passover is celebrated the night of the 24th, rather than the night of the 23rd, as Passover ends going into the 1st Day of Unleavened Bread. The last supper can be re-enacted on the night of the 23rd but this is distinct and different from the Passover Exodus 12 Seder Meal to be done as Passover ends going into the 1st Day of Unleavened Bread.
Biblical Proof that the Jewish Calendar is Incorrect in 2013 - by Don Esposito