お月見 - Moon viewing

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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.

The tradition dates to the Heian era, and is now so popular in Japan that some people repeat the activities for several evenings following the appearance of the full moon during the eighth lunisolar month.

Tsukimi traditions include displaying decorations made from Japanese pampas grass (susuki) and eating rice dumplings called Tsukimi dango in order to celebrate the beauty of the moon. Seasonal produce are also displayed as offerings to the moon. Sweet potatoes are offered to the full moon, while beans or chestnuts are offered to the waxing moon the following month. The alternate names of the celebrations, Imomeigetsu　(literally "potato harvest moon") and Mamemeigetsu ("bean harvest moon") or Kurimeigetsu ("chestnut harvest moon") are derived from these offerings.