The moon was full on July 2, and it’ll be full again on July 31. The second of two full moons in a calendar month is often called a Blue Moon.
In recent years, people have been using the name Blue Moon for the second of two full moons in a single calendar month. An older definition of Blue Moon is that it’s the third of four full moons in a single season. Someday, you might see an actual blue-colored moon. The termonce in a blue moon used to mean something rare. Now that the rules for naming Blue Moons include several different possibilities, Blue Moons are pretty common!
There’s one kind of blue moon that is still rare. It’s very rare that you would see a blue-colored moon, although unusual sky conditions ~ certain-sized particles of dust or smoke can create them.
Blue-colored moons aren’t one of those things anyone can predict. So don’t be misled by the photo above (fantastic filters thought right?).
The next Blue Moon is July 31, 2015. In recent years, many people have begun using the name Blue Moon to describe the second full moon of a calendar month. There was a gorgeous full moon on July 2, 2015. There’s another full moon on July 31 2015. So the July 31 full moon will be called a Blue Moon, according to this particular definition. This is the definition used most commonly on social media platforms, you may also see reference to the Flower Moon, the Strawberry moon etc (see picture below).
The time between one full moon and the next is close to the length of a calendar month. So the only time one month can have two full moons is when the first full moon happens in the first few days of the month. This happens every 2-3 years, so these sorts of Blue Moons come about that often.