To answer Mad Sweeney, the WT purports to calculate the date of Nisan 14 every year which would correspond to the first full moon after the vernal equinox (March 21st) in Jerusalem...since the third century, Easter has been calculated as the first Sunday after the full moon (the Paschal Full Moon) following the northern hemisphere's vernal equinox. Good Friday (the Friday before Easter Sunday) would actually correspond more closely to the Lord's Evening Meal, but neither Good Friday or Easter are directly tied to Nisan 14 directly. The calculation for Easter was reported to be established by the Council Of Nicea to unify a method for celebrating Easter by all Christian churches using both the Gregorian and Julian calenders, but there is no proof that this was actually a Nicean decree. I am sure that the naysayers (such as the WTS) have embraced this as fact, proving apostasy through another one of those pesky Council of Nicea proclamations! LOL