Meteorologists use a different method of defining the first day of fall. And, in some countries, the beginning of the seasons is determined by average temperaturesrather than fixed d… See more

In most locations on Earth—except for tropical regions—the start of fall is accompanied by rapidly shortening days. At any given location, the day-to-day difference i… See more

Astronomical fall begins on the day of the equinox. The name of the event derives from Latin and means equal night, giving the impression that both day and night are exactly 12 … See more

The date when day and night are actually equal is called the equilux. It falls a few days before the spring equinox and some days after the fall equinoxin both hemispher… See more