Celestial Spectacle: How To See This Week's Rare Full Blue Moon Event
Stargazers, mark your calendars. On Sunday, May 31, 2026, the night sky delivers a Blue Moon. However, before you picture something out of a fantasy novel, be prepared for a quite normal looking Moon. No blue tint and no cosmic paint job. So, what makes this event special? It is actually pure calendar math and orbital mechanics. It is also behind the old saying, "Once in a Blue Moon," as well as the iconic song Blue Moon, covered by the likes of Frank Sinatra and Elvis Presley.
So, what does a Blue Moon mean? A calendrical Blue Moon occurs when two full Moonsfall within the same calendar month. It happens because the lunar cycle, the time it takes the Moon to complete all its phases from New Moon back to New Moon, runs approximately 29.5 days. That's just short enough that a month can occasionally fit two full Moons,...
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