September equinox

（重定向自Southward equinox）

Illumination of Earth by Sun on the day of an equinox

The September equinox (or Southward equinox) is the moment when the Sun appears to cross the celestial equator, heading southward. Due to differences between the calendar year and the tropical year, the September equinox can occur at any time from the 21st to the 24th day of September.

单词	Southward equinox
释义	Southward equinox 英语百科 September equinox （重定向自Southward equinox） The September equinox (or Southward equinox) is the moment when the Sun appears to cross the celestial equator, heading southward. Due to differences between the calendar year and the tropical year, the September equinox can occur at any time from the 21st to the 24th day of September.
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