The 'Worm Moon' marks the time of year when the ground begins to thaw and earthworm casts become visible again. This signals the return of robins and other birds, signaling the transition into spring (in the northern hemisphere).

Fully visible from lots of major population centers: Europe, much of Asia, much of Australia, much of Africa, North America, South America, Pacific, Atlantic, Arctic, Antarctica... https://www.timeanddate.com/eclipse/lunar/2025-march-14