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The traditional Chinese lunar calendar divides the year into 24 solar terms. White Dew, (Chinese: 白露), the 15th solar term of the year, begins this year on Sept 8 and ends on Sept 23.

White Dew indicates the real beginning of cool autumn. The temperature declines gradually and the vapors in the air often condense into white dew on the grass and trees at night.

Here are 10 things you should know about White Dew.