Overview
- May produces two full moons this year, with the first on May 1 and the second on May 31, a calendrical event commonly called a "Blue Moon."
- The second full moon reaches peak fullness on May 31, according to published astronomical timings from sources using the Farmer's Almanac.
- NASA classifies this full moon as a micromoon because the Moon will be near its farthest point from Earth, making it about 6–7% smaller in apparent diameter and roughly 10% dimmer than average.
- Observers are advised to watch the Moon as it rises on the evening of May 30 from an unobstructed southeastern horizon for the largest, most colorful view, and to check local weather and horizon visibility.
- Blue moons are a rare calendar quirk that happen about every 2.5 years; the last double-full-month event was in August 2024 and the next similar month with two full moons is expected in December 2028.