From White Dew to Autumn Equinox: The Fifteen or Sixteen Days When Temperature Swings Widen
In 2026, White Dew begins on September 7 and the Autumn Equinox on September 23. Over roughly this half-month, the day-night temperature difference widens sharply across most of central and eastern China. Using the three seasonal indicators, folk sayings and the Huangdi Neijing, the ancients turned it into a lesson in "gathering in."