The next full moon, known as the Worm Moon, occurs Thursday, March 13, according to the Old Farmer’s Almanac. A full moon will appear full for a couple of days before it moves into its next phase, according to NASA.

A blood moon is coming. The entirety of the lower 48 states, the greater Americas, and some regions beyond will witness — weather permitting — a total lunar eclipse the night of March 13 and into the early morning of March 14.

Hundreds of millions of Americans will have the chance in March to see the first total lunar eclipse in nearly three years.