The Gemini~Goodwill Festival refers to the full moon that occurs each year during the sun sign of Gemini, between May 21 and June 22 (dates given are approximate, depending on the exact position of the sun in the particular cycle), wherever it may fall.

And in the somewhat rare event, as in 2016, that there are two full moons during the period when the sun is in the sign Gemini, the first full moon is generally considered to be the more potent of the two and would be the one dedicated to the Festival.

In 2016, the first Gemini~Goodwill Festival full moon occurs Saturday, May 21, and the second full moon in Gemini~Satittarius is on Monday, June 20.