>> “This night was Passover” <<
.
Actually, no, that is a common misunderstanding. The Lord’s Supper was on a night of preparation for the days of unlevened bread, and was the beginning of the fourth day, one day before the passover. The bread was normal levened bread, which can be clearly seen in the fact that he dipped a piece and passed it to Judas as a “sop” which just doesn’t work with the matzo breads.
The machinations before the trial were later that night, and he was crucified in the late afternoon on the forth day, shortly before passover began with the fifth day.
I would have to disagree only because Christ certainly knew when Passover was. As far as the bread sopping, I can guarantee you that unleavened bread can certainly be made that will soak up any liquid...been there and done that.
Even though the bread and wine of passover got changed into communion services and the Lord's supper over the years it was always understood that the bread was unleavened even in the traditional church. This was the case until the eastern churches began using leavened bread as a symbol of the risen Christ or as a symbol of new life. As an accomdation to this the Catholic church ruled that either leavened or unleavened bread could be used in communion at a council (mid 1200's?) if I remember right. But the western Catholics still use unleavened bread.