Blue moon: one small mistake, giant folklore for the sky

If you call old friends on your smart phone only once in a blue moon, start dialing: Today is your day. For an event that happens about once every 2.7 years, enjoy the full moon – because it's a Blue Moon… on a Friday… just in time for happy hourIf you call old friends on your smart phone only once in a blue moon, start dialing: Today is your day. For an event that happens about once every 2.7 years, enjoy the full moon – because it's a Blue Moon… on a Friday… just in time for happy hourBlue moon seen around the globe. Although the moon wasn't actually colored blue,

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