Noun
(astronomy) the equinoctial point that lies in the constellation of Virgo
September 22
Source: WordNetIn the southern hemisphere, the vernal equinox occurs in September and the autumnal equinox in March. Source: Internet
“As predicted by Ji-Ah, Tic did not survive the autumnal equinox. Source: Internet
The second reason why we call it the Harvest Moon is because it happens closest to the autumnal equinox. Source: Internet
Early-morning rain clouds parted and the sun illuminated psychics, gypsy dancers and henna healers who all came together to celebrate the autumnal equinox. Source: Internet
By law, the beginning of each year was set at midnight, beginning on the day the apparent autumnal equinox falls at the Paris Observatory. Source: Internet
In particular, the committee noted that the autumnal equinox of year 144 was predicted to occur at 11:59:40 pm local apparent time in Paris, which was closer to midnight than its inherent 3 to 4 minute uncertainty. Source: Internet