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The traditional Chinese calendar divides a year into 24 solar terms. Lìdōng, Rittō, Ipdong, or Lập đông (Chinese and Japanese: 立冬; pinyin: lìdōng; rōmaji: rittō; Korean: 입동; romaja: ipdong; Vietnamese: lập đông; "start of winter") is the 19th solar term. It begins when the Sun reaches the celestial longitude of 225° and ends when it reaches the longitude of 240°. It more often refers in particular to the day when the Sun is exactly at the celestial longitude of 225°. In the Gregorian calendar, it usually begins around November 7 and ends around November 22.
Lidong signifies the beginning of winter in East Asian cultures.
Pentads[]
水始冰, 'Water begins to freeze' – the initial stages of water bodies freezing over.
地始凍, 'The earth begins to harden'
雉入大水為蜃, 'Pheasants enter the water for clams'
Date and time[]
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