Full moon is called a blue moon. The term "blue moon" used in this sense may date to as early as the 16th century, but it became well known in the United States due to the "Farmers' Almanac" (published since 1818). According to the "Farmers' Almanac", a "blue moon" is the third full moon in any period between either solstice and equinox, or between equinox and solstice, (calculated using the mean tropical year), which contains four full moons. These seasons are equal in length, unlike the astronomical ones, which vary in length depending on the Earth's speed in its elliptical orbit round
A Trip to the Moon and established it definitively as a landmark in the history of cinema. LeRoy's incomplete print became the most commonly seen version of the film and the source print for most other copies, including the Cinémathèque française's print. A complete version of the film, including the entire celebration sequence, was finally reconstructed in 1997 from various sources by the Cinémathèque Méliès, a foundation set up by the Méliès family. No hand-colored prints of "A Trip to the Moon" were known to survive until 1993, when one was given to the Filmoteca de Catalunya by an anonymous donor as part of a