Autumnish or Autumn
seven Start of autumn and Autumnal equinox on the 22nd.
Although equinox means equal night, it doesn't mean that the day and night exactly the same. They are close. After the autumnal equinox the days are shorter though.
Autumnal was created on 2009-01-10.
Autumnal Moth was created in 1794.
Autumnal Rustic was created in 1788.
September 22
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).
The autumnal equinox is also known as the fall equinox and the September equinox. An example of a sentence using "autumnal equinox" is "This year's autumnal equinox falls on a full moon. "
Lines on an Autumnal Evening was created in 1793.
In 2011, the Autumnal Equinox begins on September 23rd.
Translation: the first day of autumn -OR- autumnal equinox
i screwd my boy so hard his balls turned an autumnal color