Blue Moon

 

• Blue Moon:
• May 31: The second full moon in May, making it a Blue Moon.




Types: There are two definitions: Monthly (the second full moon in a calendar month) and Seasonal (the third full moon in a season containing four full moons).
Frequency: They occur about every 2–3 years.
Upcoming Examples: The next monthly blue moon is expected on May 31, 2026, and the next seasonal blue moon occurs on May 20, 2027.
Why It's Not Blue: A blue moon looks like a normal full moon. A literal blue-coloured moon can happen, but only due to dust or smoke particles in the atmosphere, such as from a volcanic eruption.