When is the Autumnal Equinox in 2021? What are the sunrise and sunset times on the autumnal equinox?

When is the Autumnal Equinox in 2021? What are the sunrise and sunset times on the autumnal equinox?
The arrival of the Autumnal Equinox means that autumn is already halfway through. When is the Autumnal Equinox in 2021? The eighth month of the lunar calendar is also called "Mid-Autumn", and every autumn rain brings a chill. Shuimoxiansheng.com has prepared detailed fortune information for you, especially the beauty of the eighth month of the lunar calendar in 2021, waiting for you to discover!

When is the Autumnal Equinox in 2021?

The Autumnal Equinox 2021 is on the lunar calendar: August 17, 2021; the Gregorian calendar: September 23, 2021, Thursday, Libra
Autumnal Equinox Time: 03:20:55 (midnight)
Calculation method:
Formula: [Y×D+C]-L
Formula interpretation: Y=last two digits of the year, D=0.2422, L=leap year number, 21st century C=23.042, 20th century=23.822.
For example: The date of the autumnal equinox in 2088 = [8×0.2422+23.042]-[88/4]=44-22=22, September 22 is the autumnal equinox.
Exception: For 1942, add one day to the result.

What are the sunrise and sunset times for the Autumnal Equinox in 2021?

The autumnal equinox is theoretically a day when day and night are equal around the world, so sunrise is at 6 a.m. and sunset is at 6 p.m.
On the day of the autumnal equinox, the point of direct sunlight reaches 180° of ecliptic longitude (the autumnal equinox), almost directly hitting the Earth's equator, and the day and night are of equal length everywhere in the world (without considering the refraction of sunlight by the atmosphere and the twilight shadows). After the autumnal equinox, the sun's direct point continues to move from the equator to the southern hemisphere, and the days begin to become shorter and the nights longer in all parts of the northern hemisphere, that is, the day begins to be shorter than the night within a day; the opposite is true in the southern hemisphere. Therefore, the autumnal equinox is also called the autumnal equinox. At the North and South Poles, on the day of the autumnal equinox, the sun stays above the horizon all day.

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