Pope Francis said he supports the idea of setting a fixed date for Easter Sunday, which for centuries has moved back and forth according to the lunar calendar. Easter and the Holy Week that precedes it is rooted in the Jewish Passover and fixed on the first full moon, which falls on the first Sunday after the spring equinox, March 21. […] The Orthodox Churches normally celebrate Easter a week after the Catholics. […] Historians and expert agree that a common date for Easter would encourage “reconciliation between the Christian churches.” …