The Fall equinox corresponds to the specific astral event that sees the sun cross the equator. As a result, days and nights have the same duration. But what else happens on this very day?
The September equinox: a major date in the calendar
The equinox occurs twice a year:
In September, it usually occurs between September 21 and September 23 and marks fall’s beginning in the Northern hemisphere, and spring’s beginning in the Southern hemisphere.
On this specific date, the rays of the Sun fall perpendicularly on the Earth’s rotation axis. Consequently, days and nights will last the same amount of hours wherever you may be on the planet.