How to see the once-in-a-generation blue moon this Halloween

Something’s happening this Halloween that literally only comes once in a blue moon. A blue moon will light up the skies, adding another level of intrigue to the spookiest night of the year. Or, it’s just a good chance to fill the costume party-sized hole in your Instagram feed. Here’s everything you need to know about the event, and how to see it. To be clear, a blue moon isn’t actually blue. It’s just a term we use to describe the rare occurrence when we get two full moons in the same calendar month. According to the Farmers’ Almanac, a blue moon occurs every two and a half to three years. However, due to some funky calendar changes over the decades, it hasn’t happened on Halloween since 1944, making this a truly once-in-a-generation phenomenon. The moon will be at its brightest at 10:49 a.m. EST. So, if you’re in the U.S., your best bet is to catch it in that sky early Halloween morning. Thankfully (or unfortunately, depending on how superstitious you are), we won’t have to wait 76 years for this to happen again. The next Halloween blue moon is set to arrive in 2039