Passover began last night at sunset (7:32 PM) and the official full moon rises tonight at 8:10 PM. Astronomers determine a full moon by calculating the percentage of illumination as tonight’s moon will have 100% illumination. One school of thought suggests “light” was needed for the Israelites to leave Egypt, in darkness, and continue their journey out of bondage. Guiding them was a full moon, referred to as the Passover moon. As noted in previous columns, Easter is calculated as the first Sunday after the paschal full moon or after the vernal equinox that began on March 20th. Moon phase is a component in determining when Easter occurs during the Liturgical year. Lent began 37 days ago. Easter occurs anywhere between March 22 and April 25.