Moon Viewing Day (Tsukimi)

Source: http://www.google.com/logos/moonja09.gif
Tsukimi (月見) or Otsukimi, literally moon-viewing, refers to Japanese festivals honoring the autumn moon. The celebration of the full moon typically takes place on the 15th day of the eighth month of the traditional Japanese lunisolar calendar; the waxing moon is celebrated on the 13th day of the ninth month. These days normally fall in September and October of the modern solar calendar. [Read more on Wikipedia]