Look in the sky; Last blue moon until 2020
Grand Rapids, Mich. –The blue moon will be at it’s best view around 7 a.m. Saturday.
If you’re a blue moon fan you don’t want to miss this.
A blue moon is when there’s more than one full moon in a single calendar month.
This is the second blue moon of the 2018 calendar year.
It will also be the last until the year 2020.