Skywatchers are in for a rare celestial event as a Blue Moon will appear on May 31, 2026. Despite its name, the Moon will not actually look blue. A Blue Moon happens when two full moons occur within the same calendar month - a rare event that only takes place once every few years. This is also where the popular phrase “once in a blue moon” comes from.

The first full moon of May appeared earlier in the month, while the second full moon will rise at the end of May, officially making it a Blue Moon. Astronomers say this event usually happens only once every two to three years, making it special for skywatchers and space enthusiasts.

The May 2026 Blue Moon will also be a Micromoon, which means the Moon may appear slightly smaller and dimmer than usual. This happens because the Moon will be farther away from Earth during its orbit at the time of the full moon.

People will be able to watch the event with the naked eye from most locations with clear skies. Experts suggest viewing it during moonrise and away from bright city lights for the best experience.