Blue Moon on October 31: Why is it called so? | Oneindia News
31st October, 2020, will witness a rare blue moon event. When 2 full moons fall in the same calendar month, the second full moon is called a blue moon. Since this is a rare occurence, the phrase once in a blue moon describes an event or phenomenon that happens after long gaps in time.
#BlueMoon #Halloween #October31
#BlueMoon #Halloween #October31