If Easter seems to be coming a bit earlier than usual, that’s because it is. Determined by the spring equinox, the holiday comes on March 27 this year, which is on the early side. As a result, Good Friday, the Friday preceding Easter, will fall on a built-in bad weather makeup day.

In 325 A.D., a gathering of bishops stipulated that Easter should always be celebrated on the first Sunday after the first full moon of the spring equinox which begins this year on March 21. Easter 2017 will be celebrated on April 16.