World: (RightNow) On September 23, 2026, the autumnal equinox begins in the Northern Hemisphere. During this time, day and night are each 12 hours long worldwide.

Every year between September 21 and 24, autumn starts in the Northern Hemisphere and spring in the Southern Hemisphere. During this period, the sun passes directly over the equator.

According to the National Weather Service, there are two times a year when the Earth is not tilted towards the sun. As a result, daylight and darkness are equal.

This event is not only scientifically interesting but also significant in terms of climate change. The impact of seasonal changes is noticeable in different regions.

It is noteworthy that a similar occurrence happens during the vernal equinox on March 20, when the sun again crosses the equator, marking the start of spring in the Northern Hemisphere.