On March 20 for the Northern Hemisphere (this is the autumnal equinox in the Southern Hemisphere). The vernal equinox for the Southern Hemisphere will be either September 22 or 23.
The vernal equinox is in March in the northern hemisphere and in September in the southern hemisphere.
It all depends on where you are, the northern hemisphere or the southern one. Generally speaking, in the northern hemisphere, September is considered the fall while in the southern hemisphere, September would be considered spring. However, the equinox marks the changes of seasons and September 22nd or 23rd is the normal date for the equinox. Therefore, prior to the equinox, September is technically summer in the northern hemisphere and changes to fall at the equinox. Conversely, in the southern hemisphere, prior to the equinox, September is considered winter and changes to spring at the equinox.
In the northern hemisphere it is in September. In the southern hemisphere it is in March.
In the northern hemisphere is is the 21st of September. In the southern hemisphere it is the 21st of March.
The equinox in autumn, on about September 22 in the northern hemisphere and March 20 in the southern hemisphere.
Not just Australia, the whole of the Southern Hemisphere. In the Southern Hemisphere, the Winter Solstice is on the 21st of June, the Summer Solstice is on the 21st of December. The Spring Equinox is on the 21st of September, and the Autumn Equinox is on the 21st of March. Therefore, Spring commences on the 1st of September in the whole of the Southern Hemisphere. Unfortunately, because the earth is viewed inaccurately from a Northern Hemisphere perspective, the Southern Spring Equinox is actually referred to as the "Autumnal Equinox" so that it does not confuse the northerners.
The Fall Equinox is the September Equinox in the Northern Hemisphere and the March Equinox in the Southern Hemisphere. The weather seasons can be roughly decided by the month in which the season starts and the two months following. northern hemisphere - September, October, November (begins Sept 22/23) Southern Hemisphere - March, April, May (begins March 20)
The fall equinox occurs in September in the Northern Hemisphere.
The sun is directly over the southern hemisphere from the September equinox until the March equinox.
There are two different types of equinoxes; the Vernal Equinox which happens on March 21 or 22. There is also a Autumnal Equinox which happens on September 21, 22 or 23.
It all depends on where you are, the northern hemisphere or the southern one. Generally speaking, in the northern hemisphere, September is considered the fall while in the southern hemisphere, September would be considered spring. However, the equinox marks the changes of seasons and September 22nd or 23rd is the normal date for the equinox. Therefore, prior to the equinox, September is technically summer in the northern hemisphere and changes to fall at the equinox. Conversely, in the southern hemisphere, prior to the equinox, September is considered winter and changes to spring at the equinox.