Wednesday institution of the Lord's Supper

Last spring I read and printed a Yahoo News article titled Last Supper was a day earlier, scientist claims. As I was sorting and filing this morning, I found the 2 pages I had printed which reminded me of this. As one who has long ago come to a conclusion that Jesus was crucified on Wednesday rather than Friday, I found this claim interesting. The scientist, Colin Humphreys has written a book called The Mystery Of The Last Supper which says it finds "a new solution" to the chronology of Jesus's last days "based on a combination of Biblical, historical and astronomical research." I have no idea of Humphreys' position on the authority of the Bible and can't recommend what he wrote. I, nevertheless, found it intriguing. The following comment is helpful to address those who think the Gospel accounts are contradictory:

“Whatever you think about the Bible, the fact is that Jewish people would never mistake the Passover meal for another meal, so for the Gospels to contradict themselves in this regard is really hard to understand,” Professor Humphreys said.