May is an exciting month for Moon watchers, as it features two Full Moons instead of the usual one. The first occurred on May 1, the Flower Moon , and the second is set to appear on May 31. When a month contains two Full Moons, the second one is known as a “Blue Moon." Don't worry, you're not going to look up and see a literal blue colored moon in the sky, the name just refers to its rarity. Intrigued? Keep reading to find out more about the second of this month’s Full Moons. When is the May full moon? The Full Moon will occur on Sunday, May 31. Time and Date estimates it will peak at 4:45 a.m. ET. What is the May full moon called? This Moon is simply known as a Blue Moon, perhaps a nod to the famous saying... Mashable Light Speed These occur when there are two Full Moons in the same month. Because the lunar cycle is just under 30 days, the timing occasionally lines up like this, with one Full Moon at the start of the month and another at the end.…