Skywatchers across the United States and astronomers who track monthly lunar cycles, are preparing for a pair of celestial events in May. The Weather Channel highlighted the phenomenon, encouraging viewers to look up for two unusually photogenic full moons. 

May will feature both the Flower Moon, the traditional name for the month’s full moon, and a seasonal blue moon, a rarer event that occurs when four full moons appear within a single astronomical season. Unlike the “once in a blue moon” phrase suggests, a blue moon does not turn blue; instead, it marks an extra full moon squeezed into the seasonal calendar. These events often produce brighter than usual moonlight, and the Flower Moon is known for its warm, golden glow. 

The Flower Moon rises in early May, reaching peak illumination just after sunset. The seasonal blue moon follows later in the month, offering a second opportunity for nighttime viewing. The twin lunar events will be visible throughout North America, with rural regions offering clear views thanks to their dark, unobstructed skies. 

These two events occur due to the Moon’s steady 29.5-day orbit around Earth and the way lunar phases align with the solar calendar. Seasonal blue moons are uncommon, making this pairing rare.