Last Supper was a day earlier?

The crucifixion, also known as the last supper, of Jesus Christ was on Wednesday, one day before the widely celebrated Maundy Thursday. This is claimed by a new research, by Professor Colin Humphreys, a scientist at the University of Cambridge.
Never realized that Cambridge has such a serious research or researcher conducting researches on this last supper.

Humphreys uses a combination of biblical, historical and astronomical research to try to pinpoint the precise nature and timing of Jesus's final meal with his disciples before his death.

Sounds like a chicken and egg situation from the very beginning. It looks more like a fantasy story than a scientific research. With due respect to all religions, can any religion be actually studied by "a combination of biblical, historical and astronomical research"? Does any religion like to be studied scientifically? Does any religion even belief in any science? If not, how can it be studied scientifically at all?