For the first time in decades, Halloween night will get the ultimate spook treatment.
According to The Farmer's Almanac the last time there was a full moon in all U.S. time zones on Halloween was 1944. The next one isn't expected to happen until 2039, according to NASA.
Although Saturday's moon will be a "blue" moon, it won't actually appear to be blue; scientists use the term to describe the second full moon of a given month, which only occurs about once every 2 1/2 years.
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