March's full moon — named for the earthworms that reappear as the soil thaws. The signs of spring behind the name, and how to see it.
The name was used by southern Native American tribes who noticed that, as March's soil thawed, earthworm casts reappeared and drew robins and other birds. Northern tribes instead named it the Crow Moon (for returning crows), the Sap Moon (for the flow of maple sap), or the Crust Moon for the thaw-and-freeze crust on the snow.
Falling near the spring equinox, the March full moon is in transition between the high winter moons and the lower spring ones. It still climbs fairly high and looks bright; in many years the March full moon is the one used to set the date of Easter.
The 2026 Worm Moon is the standout of the year's first half: it coincides with a total lunar eclipse on March 3. As the full Moon slides through Earth's shadow, the only light reaching it is sunlight bent through our atmosphere — every sunrise and sunset on Earth at once — and the Moon glows deep copper-red for about an hour of totality. The eclipse favors observers around the Pacific: East Asia, Australia and western North America see it best, with the Moon setting mid-eclipse for the eastern United States.
Unlike a solar eclipse, a lunar eclipse is completely safe to watch with the naked eye, needs no glasses, and unfolds slowly over hours — an unhurried spectacle that pairs strangely well with a moon named for the first stirrings of spring soil.
The Worm Moon is the final full moon before the March equinox, which is why medieval Europe knew it as the Lenten Moon — the moon of Lent, whose timing anchors the whole Christian movable calendar. The name "Worm" itself may not even refer to earthworms: some historians trace it to the beetle larvae that emerge from thawing tree bark, recorded by Captain Jonathan Carver in the 1760s among the Naudowessie (Dakota). Either way, the meaning is the same — the frozen ground is waking up, sap is running (the Sap Moon), and the crows are back (the Crow Moon).
Get a closer look
A beginner telescope or good astronomy binoculars bring the Moon's craters and phases into stunning detail: the CELTICBIRD 70/700 refractor (about €140) or the Celestron SkyMaster 15x70 binoculars (about €130, 22,000+ reviews).
CELTICBIRD 70/700 telescope (~€140) → Celestron SkyMaster 15x70 (~€130) →As an Amazon Associate, Furiosa Studio earns from qualifying purchases.