And then, because we’re going to see this total lunar eclipse, it’ll give the moon a little bit of a reddish or bloodish color. They put together the fact that it’s a blood-looking moon with the fact that it’s a full worm moon, and thus, you get the “blood worm moon.”

The March event is a total lunar eclipse thanks to the positions of the sun, Earth and moon in relation to each other. Earth will drape its shadow over the moon until the moon is blanketed by the darkest part of the shadow. This doesn't blot out the moon, but it creates a change in its color.