March 20 and September 22
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.
That is the Vernal Equinox; as opposed to the first day of Fall's Autumnal Equinox.
Autumn equinox and spring equinox I believe...
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).
There is 1 day for each equinox: the vernal equinox in spring and the winter equinox in winter.
The equinox is when the day and night are equal (this happens twice a year, in summer and winter). Here are some sentences.On the day of the summer equinox, we had a picnic in the meadow.The equinox if caused by the rotation of the earth.We studied the equinox in science class.
The first day of spring is called the vernal equinox or the March equinox.
During the Autumn equinox the length of the day and night are nearly equal. The length of the day on the equinox is approximately twelve hours.
Both.
It's called an Equinox.
The longest day and shortest night occurs on the summer solstice. The shortest day and longest night occurs on the winter solstice. Midway between these points (2x a year) are the equinox, where the day and night are of equal length.