Context:
In Humphreys' theory, Jesus went by an old-fashioned Jewish calendar rather than the official lunar calendar which was in widespread use at the time of his death and is still in use today.
This would put the Passover meal -- and the Last Supper -- on the Wednesday, explaining how such a large number of events took place between the meal and the crucifixion.
It would follow that Jesus' arrest, interrogation and separate trials did not all take place in the space of one night but in fact occurred over a longer period.
Humphreys believes a date could therefore be
ascribed to Easter in our modern solar calendar, and working on the basis that the crucifixion took place on April 3, Easter Day would be on April 5.
More:
http://news.yahoo.com/s/afp/20110418/wl_uk_afp/britainreligionchristianseaster