Lidong Explained

The traditional Chinese calendar divides a year into 24 solar terms. Lìdōng, Rittō, Ipdong, or Lập đông 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.^[1]

Lidong signifies the beginning of winter in East Asian cultures.^[2]

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'

Notes and References

1. Book: Guo, Rongxing . An Economic Inquiry into the Nonlinear Behaviors of Nations: Dynamic Developments and the Origins of Civilizations . 2017-02-06 . Springer . 978-3-319-48772-4 . 160–161 . en.
2. Book: Martzloff, Jean-Claude . Astronomy and Calendars – The Other Chinese Mathematics: 104 BC - AD 1644 . 2016-09-01 . Springer . 978-3-662-49718-0 . 64 . en.