The fact that it's a Paschal Moon means it's the first full moon of spring. However, the real lunar phenomenon by the same name will also occur Saturday (March 31) for the second and final time in 2018, according to Live Science.
It's even more special to spot two blue moons in one year. The reason behind this anomaly is that February is the only calendar month that is shorter than synodic (length of time for the moon to cycle from one full moon to the next) month. This year, January had two full moons. They occur, on average, once every 2.7 years because it takes the moon roughly 29.5 days to circle Earth, but the calendar month has 30 or 31 days - except for February, Space.com says.
A blue moon is not as rare as the expression "once in a blue moon" implies. If you want to see it, watch the sky for tonight's moonrise which will be beginning at 7:25 pm, or Easter Sunday's moonrise best viewed starting at 8:31 pm.
Native Americans knew the fourth full moon of the year as the Sap Moon, the time of year when the sap was flowering in the trees. Firstly, this weekend's celestial event is the last chance for sky watchers to witness a Blue Moon for the next couple of years.
Both the January and March 2018 Blue Moons are blue in name only.
Incidentally, there is an older definition of a Blue Moon that refers to an extra full moon happening in a season.
"The term "blue moon" actually has nothing to do with the color of the moon", Samuhel clarified.
The very first moon of the month obtains the name "complete worm moon" due to the fact that it shows up around the moment that earthworms start ahead from the ground throughout the springtime period.
"Most Blue Moons look pale gray and white, indistinguishable from any other moon you've ever seen", NASA stated. The upcoming Blue Moon will later be visible to the west as it's about to set.