Everyone is free to give any name to anything, and sometimes a definition sticks, sometimes it doesn't. There's rarely any logic behind it. Only two of the year's full moons are accepted by science and astronomers, the Harvest Moon around the September Equinox, and the next full moon after that, the Hunters Moon. No full moon consistently looks different from any of the others, though, let alone blue.
Everyone is free to give any name to anything, and sometimes a definition sticks, sometimes it doesn't. There's rarely any logic behind it. Only two of the year's full moons are accepted by science and astronomers, the Harvest Moon around the September Equinox, and the next full moon after that, the Hunters Moon. No full moon consistently looks different from any of the others, though, let alone blue.