On, or very close to, March 21.
There is 1 day for each equinox: the vernal equinox in spring and the winter equinox in winter.
That is the Vernal Equinox; as opposed to the first day of Fall's Autumnal Equinox.
Both.
The Vernal Equinox
The first day of spring is called vernal equinox!
When will the vernal equinox be in 2010
one year. the vernal equinox is on March 21, or the first day of spring. an equinox is when day and night is equal (12 hours daylight, 12 hours nighttime). there is a Vernal equinox in spring, and an autumnal equinox on the first day of autumn (or fall), September 21.
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.
The first day of spring is called the vernal equinox or the March equinox.
the vernal equinox is always on the 21 of march. that's the day I'm righting this. _______________________________ The equinoxes occur on March 21 and September 21, plus or minus one day because of the cycle of leap years. In the northern hemisphere, the vernal equinox is in March, and the autumnal equinox is in September; in the southern hemisphere, it's reversed. In 1978, the vernal equinox in the northern hemisphere was March 20, 1978 at 5: 10 PM GMT.
"I can't wait to celebrate the Vernal Equinox (the first day of Spring)!"
The adjectives vernal and autumnal mean "of spring" and "of autumn (fall)" respectively. The equinox, when the day and night are even, occurs twice a year. Once in spring and once in autumn (fall) as we move from the extremes of the summer and winter solstices. Therefore we have a vernal equinox (in spring) and an autumnal equinox (in autumn/fall).