Best seen: moonrise on Sunday, March 24 The “Worm Moon”—also known as the “Crow Moon” and the “Lenten Moon”—will move through the Earth’s outer shadow in space. A slight penumbral lunar eclipse will result for the night side of Earth, including North and South America, Europe, East Asia, Australia and New Zealand. This moon gets its name from the earthworms that begin to emerge in the thawing soil, signalling the arrival of spring in the Northern hemisphere. It's also known as the Crow Moon in some Native American traditions.