In the northern hemisphere is is the 21st of September. In the Southern Hemisphere it is the 21st of March.
Autumn equinox and spring equinox I believe...
The first day of autumn is called the autumnal equinox.
The word is "equinoctial" = equal day and night. It occurs twice a year, on the first day of Spring, and the first day of Autumn.
It is called equinox. Equinox happened 2 times per year on spring and autumn so called the name spring equinox and autumn equinox.
equinox
Autumn
There are two solstices. they are the summer solstice (first day of summer), and the winter solstices (first day of winter An equinox is when day and night are the same length. like solstices, there are two of them. The Autumn equinox (first day of autumn), and then the spring equinox (first day of spring).
There are two solstices. they are the summer solstice (first day of summer), and the winter solstices (first day of winter An equinox is when day and night are the same length. like solstices, there are two of them. The Autumn equinox (first day of autumn), and then the spring equinox (first day of spring).
The equinox happens on Sept. 22. It marks the first day of autumn.
The Autumn equinox and the Spring equinox .
Autumn.It is regarded by some as the start of Autumn. There are different perspectives on when exactly Autumn starts, but for some it is the Autumnal equinox.
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