This year on Halloween night, the sky will be aglow with moonlight from a rare full blue moon.
If you picked a werewolf as your costume this year, you're in luck.
Remember, daylight saving time ends on Halloween as well. The time change and bright moonlight may leave you wanting a nap on Sunday.
What is a blue moon?
According to NASA, a blue moon is the second full moon in any given calendar month. The actual hue of the moon will not appear bluer. Blue moons happen every one to two and a half years, coining the term "once in a blue moon".
In fact, all Halloween full moons are blue moons, because the moon phase is about 29.5 days and there are 31 days in October.
How rare is a full moon on Halloween?
NASA says a Halloween full moon happens once every 19 years. The next will be in 2039.
When is moonrise and set on the 31st?
In mountain time, expect moonrise at about 6:20 pm and moonset around 7:30 am.
