the autumnal equinox in the southern hemisphere is on 23 september.
the autumnal equinox in the southern hemisphere is on 23 september.
when is the autumnal equinox in the southern hemisphere?
23 september
by astronomical convention, the four seasons can be determined by the solstices—the points in the orbit of maximum axial tilt toward or away from the sun—and the equinoxes, when the direction of the tilt and the direction to the sun are perpendicular. in the northern hemisphere, winter solstice currently occurs around 21 december; summer solstice is near 21 june, spring equinox is around 20 march and autumnal equinox is about 22 or 23 september. in the southern hemisphere, the situation is reversed, with the summer and winter solstices exchanged and the spring and autumnal equinox dates swapped.
earth
bullet::::- vernal equinox and autumnal equinox: these classical names are direct derivatives of latin ("ver" = spring and "autumnus" = autumn). these are the historically universal and still most widely used terms for the equinoxes, but are potentially confusing because in the southern hemisphere the vernal equinox does not occur in spring and the autumnal equinox does not occur in autumn. the equivalent common language english terms "spring equinox" and "autumn (or fall) equinox" are even more ambiguous. it has become increasingly common for people to refer to the september equinox in the southern hemisphere as the vernal equinox.
equinox