The Worm Moon, also known as Storm Moon (because worms typically come out after a storm) is the name given to March’s Full Moon. It is usually either the last Full Moon before Spring or the first one after the Spring Equinox, when we celebrate Ostara 🌷. Why celebrate the Worm Moon with some Magic? In the Northern Hemisphere, March is the month of the worm. The “worm” here refers to grubs that emerge from their thawing winter hideouts.