when will the next blue moon happen

The next Blue Moon will occur on May 31, 2026. This will be a calendrical Blue Moon, which means it is the second full moon in a calendar month. The next seasonal Blue Moon will be on May 20, 2027. Blue Moons typically happen every 2.5 to 3 years, and although the term "Blue Moon" suggests a bluish color, the Moon itself usually appears pale gray or white during this event.