The night sky on Halloween will be illuminated by a blue moon, the second full moon in a month. The relatively rare occurrence happens once every two and a half years on average, according to NASA ...

Tomorrow night, on Halloween, there will be a rare blue moon. (Thanks, Mother Nature, but this doesn’t let you off the hook for COVID-19, wildfires, extreme weather, etc.)Here’s what you need ...

The last time a Halloween full moon appeared was for the Central and Pacific time zones in 2001. The "once in a blue moon" phenomenon does not necessarily mean the moon will look blue on Halloween.