The night sky featured two full moons in May 2026, including a rare calendrical Blue Moon that also functioned as a micromoon [1].

This celestial alignment is significant because it combines two distinct lunar phenomena—a monthly calendar anomaly and a specific orbital position—within a single four-week window. Such events provide astronomers and sky-watchers a unique opportunity to observe the moon at its furthest orbital point while occurring in a rare monthly sequence.

The first full moon of the month, known as the May Flower Moon, peaked on Friday, May 1, 2026 [1]. This moon rose in the constellation Scorpio [2] and appeared during the Eta Aquariids meteor shower [2].

Following the first event, a second full moon occurred later in the month [1]. "The month of May 2026 will feature two full moons, a rare event known as a calendrical Blue Moon," Citizen Times staff said [1].

Unlike a typical full moon, this second event was classified as a micromoon. This occurs because the moon was near its apogee, the point in its orbit farthest from Earth [1]. This distance causes the moon to appear smaller in the sky than it does during a supermoon [1].

These events were visible from the night sky worldwide [2]. The combination of the Flower Moon and the subsequent Blue Moon created a dense period of lunar activity for observers across different hemispheres [2].

Observers were encouraged to track the movement of the moon as it transitioned through the constellations. A WION Podcast host said, "Discover the incredible story hidden behind one of the sky’s most mysterious full moons."

“The month of May 2026 will feature two full moons, a rare event known as a calendrical Blue Moon.”

The occurrence of a calendrical Blue Moon is a result of the lunar cycle not aligning perfectly with the Gregorian calendar. Because a lunar month is approximately 29.5 days, two full moons can occasionally fit into a 31-day month. When this coincides with the moon reaching apogee, it creates the micromoon effect, providing a visual contrast to the more commonly discussed supermoons.