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This May There Is the Rare Blue Moon

In May 2007, the full moon will appear twice. The first full moon is on May 2nd and the second full moon is on May 31st. This rare second moon is known as ‘Blue Moon.’ No! The moon will not change its color to blue. A blue moon is the second full moon in a month.

This second moon is based Gregorian calendar and therefore this rare sighting has nothing to do with Hindu Calendars. But there will be two ‘poornimas’ (full moon) in May.

The blue moon was last sighted on July 31, 2004. Now you must be thinking about the phrase ‘once in a blue moon,’ which means ‘not very often.’ Yes, the phrase is related to this rare sighting of the moon.

For a blue moon to appear there must be at least 30 days in a month because the average number of days between two full moons is around 29 days. Because of this, February will never have a blue moon.

After the Blue Moon on May 31st 2007 one has to wait till December 31st 2009. Since the date is on 31st, depending on the time zone some countries might not have a Blue Moon or some might have it on 31st and 1st of next month.