This partial article is a repost from "The Old Farmer's Almanac"
Watch for the Full Harvest Moon
Being full Moons, both of these autumn Moons rise above the horizon around sunset. For several days around the time of the full Harvest Moon, the Moon rises only about 30 minutes later each night. This extra light early in the evening is what makes this time of year special, and traditionally is what gave farmers extra days for harvesting beyond sunset. Hence, the name “Harvest” Moon!
As the Moon rises from the horizon around sunset, it may appear larger and more orange—how perfect for the fall season! But don’t be fooled by the “Moon Illusion,” which makes the Moon appear bigger than it really is.
A Spooky Halloween Blue Moon
As stated above, October’s second full Moon lands on Saturday, October 31, making Halloween night extra special this year. Plus, the second full Moon in a single calendar month is often called a “Blue Moon,” giving us a spectacular (and spooky) Halloween Blue Moon!