April is the fourth month of the year in the Gregorian and Julian calendars. It has 30 days, following March and preceding May. April is often associated with the arrival of spring, as temperatures begin to rise and flowers bloom. Some popular holidays and events that take place in April include Easter, which falls on the first Sunday after the full moon occurring on or after the vernal equinox, usually in March or April; Earth Day, observed on April 22nd; and the start of the college basketball season. In English, April is typically pronounced "a-PRIL" or "AH-PROL."