I wondered why Easter and Passover didn't fall near each other this year, which, according to the Gospels which include the Last Supper (which is a Passover dinner). Well, I found this site Moonwise: New Easter Dates via the Librarians' Index to the Internet . Not that I can make a lot of sense out of it, but if you are willing to read through it, it explains how Easter of both West and East Christian faiths are figured until 2205, as far as I can tell....