Tonight is the last blue moon of the year. This is when two full moons occur in the same month, hence the term once in a blue moon.. The march full moon is called the Worm Moon by most native american tribes. “At the time of this spring Moon, the ground begins to soften and earthworm casts reappear, inviting the return of robins. This is also known as the Sap Moon, as it marks the time when maple sap begins to flow and the annual tapping of maple trees begins.”
This year in 2018 it is also known as the Paschal Full Moon, the first full moon of the spring season. Also the first sunday following the Paschal moon is Easter and that is on April 1st this Sunday. Something that also occurs once in a blue moon.