The September Equinox - September
Sun, Sep 22, 2024

The September Equinox

The September Equinox is a holiday dedicated to when the length of day and night are approximately equal. However, scientists note that the September equinox can occur on any day between September 21 and 24. This is because the calendar and tropical years are different. Another name for the holiday is the southern equinox, as the Sun moves from north to south and crosses the equator.


The September Equinox marks the end of summer and the beginning of fall in the Northern Hemisphere. This holiday is celebrated in different parts of the world, but it has different meanings and names. For example, in Western Asia, it is called Mehra Day, in Japan, it is the Higan holiday, and in Europe, it is a harvest festival.

Interesting Facts

  • In the French Republican Calendar, New Year’s Day was celebrated on the September equinox.
  • In the United States, traditional equinox events are held in Illinois.
  • After the autumnal equinox, sunrises become later, sunsets earlier, and the days become colder.
  • After the fall equinox, the Sun at the North Pole falls below the horizon, leading to six months of twilight.
  • In the Southern Hemisphere, spring begins after September 23.

How to Take Part

Visit the nearest observation deck and observe the Sun. This amazing astronomical event is very interesting and informative. Read about astronomy—a science that tells us not only about the stars but also about the future of humanity. Many regard the September equinox as the New Year; sum up the past year and outline your plans for the future.

When is the September Equinox in 2024?

The September Equinox can occur any day between September 21-24.


Weekday Month Day Year
Sunday September 22 2024
Tuesday September 22 2025
Wednesday September 23 2026
Thursday September 23 2027
Friday September 22 2028
Saturday September 22 2029