October’s first full moon is the harvest moon on October 1, and the second full moon will occur on October 31. That’s right: a full moon on Halloween.
While the moon won’t actually look blue, the second full moon in one month is usually referred to as a blue moon. This happens every 2.5 to three years, or “once in a blue moon.”
Previously, a blue moon was known as the third or fourth full moon in a single season.
Typically, the next moon after the harvest moon is known as the hunter’s moon — when hunters used moonlight to hunt prey and prepare for winter.
While a blue moon seems rare, a full moon on Halloween across time zones is even more rare — an event that hasn’t occurred since 1944.
However, a full moon occurs on Halloween every 19 years in some time zones, so you can expect a full Halloween moon again in 2039, 2058, 2077 and 2096.
The full Halloween moon will rise at 10:49 am ET on October 31 — which explains why the moon will be visible across time zones. This is also the last day of Daylight Saving Time, so set your clocks back an hour on November 1 at 2 am.
Make way for Mars
It’s actually Mars, which will make its closest approach to Earth at 10:18 am ET on October 6.
Mars will be 38,586,816 miles away from Earth — yes, that’s close for Mars — and it won’t be this close again until 2035.