Look up to see this worm.

Through Wednesday, a full worm supermoon will be visible in the sky.

The phenomenon, which began early Sunday and will last through early Wednesday, is a harbinger of spring. While the worm moon lasts three days, Monday is the official full moon.

There are a number of Native American names for March’s full moon, including the Worm Moon, as well as the Crow Moon, Crust Moon, Sap Moon and Sugar Moon, NASA reports. The Worm Moon title, a name given to March’s moon by more southern tribes, references the soil softening during the month, and the earthworms emerging for the warmer weather.

Europeans traditionally know March’s moon as the Lenten Moon, a reference to the Christian calendar’s season of Lent that occurs during this time.

March’s moon this year is a supermoon, a term astrologer Richard Nolle coined in 1979 to refer to a full moon that occurs within 90 percent of its perigee, or the closest it gets to Earth in an orbit, NASA writes. By this definition, the February full moon was also a supermoon.

In 2020, March’s full moon also falls at the end of daylight saving time, when clocks are set forward an hour, signaling the end of winter and the beginning of spring. The official beginning of spring, the vernal equinox, is on March 19 this year.

But according to both Punxsutawney Phil and Staten Island Chuck, famed and fluffy Nostradamuses of when spring’s true arrival will be, the season will come early this year. Both groundhogs failed to see their shadows on  Groundhog Day in February, meaning six less weeks of winter and an early spring.

Ref: NYPost