The next Blue Moon day depends on the type of Blue Moon:
- The next calendrical Blue Moon (second full moon in a calendar month) will be on May 31, 2026.
- The next seasonal Blue Moon (the third full moon in a season with four full moons) will be on May 20, 2027.
A Blue Moon happens roughly every 2.5 to 3 years. The exact date may vary slightly depending on the time zone of the observer.
