Important Notice: Our web hosting provider recently started charging us for additional visits, which was unexpected. In response, we're seeking donations. Depending on the situation, we may explore different monetization options for our Community and Expert Contributors. It's crucial to provide more returns for their expertise and offer more Expert Validated Answers or AI Validated Answers. Learn more about our hosting issue here.
The term “blue moon” began when Krakatoa blew its top and made the moon actually take on a bluish tint for awhile. Since an eruption like that is rare, anything rare is now spoken of as a blue moon. As referring to only the moon, two full moons are rare in a given month and thus the second one is called a blue moon.
