There are various places to find the dates of full moons, including wall calendars and websites such as moongiant.com, space.com and almanac.com. A full moon is one of the eight phases of the moon.
During the full moon phase the side facing the earth is almost completely illuminated by the sun, giving it the appearance of a full disc. At other phases the moon is partially obscured by a shadow cast by the earth onto the moon's surface. This causes the moon to appear as other shapes, such as a half-disc or crescent. A full moon occurs once every four weeks, which makes it possible for some months to have two full moons.