Easter is celebrated on the Sunday after the first full moon after the spring equinox. I like the sound of â€śafter the first full moon.â€ť 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. â€śWe ought not,â€ť said Constantine, â€śto have anything in common with the Jews.â€ť What was he thinking? As if by some anti-Semitic decree Christians might have nothing in common with the very ground that birthed them.