What in the world is a Worm Moon? Well, it turns out it's not a big deal. It's just what they call the first full moon in March, which happens on March 1. It's always the last full moon before the first day of Spring. It's named that because, according to Wikipedia, March is when the earthworms emerge from the soil. If you're into astronomy, you can read more about it at Space.com. If you're into astrology, there's some interesting info at HelloGiggles.com.