The Moon will be located on the opposite side of the Earth as the Sun and its face will be will be fully illuminated. This phase occurs at 14:51 UTC.
Since this is the second full moon in the same month, it is sometimes referred to as a blue moon. This rare calendar event only occurs every few months, giving rise to the term “once in a blue moon”.
A year has 12 months, and months, or “months,” have lengths more or less based on a single orbit of the moon around Earth. What we call a season – winter, spring, summer, fall – typically lasts three months, and typically has three full moons.
If a season has four full moons, then the third full moon may be called a Blue Moon, according to the old Maine Farmer’s Almanac.
Irene W. Pennington Planetarium 