秋分 The Autumn Equinox

昼渐短  夜渐长  夏渐收  秋渐浓

On the Chinese lunar calendar,“Autumn Equinox” is thebeginning of autumn and this day is just at the middle pointbetween “Autumn Begins” to “Hoar Frost Falls”.It arrives onSeptember 22 to September 23 each year when the sunreaches the celestial longitude of 180 degrees.

After that day, the location of direct sunlight moves to the south, making days shorter and nights longer in the northern hemisphere.