Easter is celebrated on the Sunday after the first full moon after the spring equinox. I like the sound of “after the first full moon.” I like how it ties the liturgical calendar to the rhythms of the planet, the migration of birds, the mating of frogs, the amount of light in our days. I realize that the Council of Nicaea established this method of dating in an effort to make Easter distinct from Passover. “We ought not,” said Constantine, “to have anything in common with the Jews.” What was he thinking? As if by some anti-Semitic decree Christians might have nothing in common with the very ground that birthed them.