After Friday, your next chance to see two full moons in one month won't come until December 2028. May will play host to one of the most interesting lunar events of 2026, beginning Friday night: two full moons. The rare pair will bookend the month, with the first full moon arriving Friday, the first day of the month, and the second appearing at the end. The second full moon in a single month is known as a blue moon, which inspired the phrase "once in a blue moon" to describe something rare. According to  The Old Farmer's Almanac , the first full moon in May reaches its peak brightness at 1:23 p.m. ET, or right in the middle of the day. The best time to see the full moon is the evenings of Thursday and Friday. You won't need any help; it'll be the brightest thing in the night sky. This moon is commonly called the Flower Moon, named in honor of the spring flowers blooming right now.  The second full moon reaches its peak brightness at 4:45 a.m. ET on May 31.…