autumnal equinox
September equinox
fall equinox

Smith visited the hill each year on the fall equinox (September 22) between 1823 and 1827 and claimed to be instructed by the angel Moroni.

THE fall equinox is just around the temporal bend, but in classical musical life that usually signals the beginning of spring.

Right now, when the first full moon after the fall equinox is waning toward the half, is best for a Seeking like ours.

Laurel and Melanie had been talking over the weekend about the fall equinox, which was today too.

"Dominique, please - I need you to get me out of this asylum before the fall equinox."

The last time we spoke, you warned me about some kind of rare galactic alignment orienting itself to Earth beginning on the fall equinox.

Mick practically predicted the arrival of that deep-space radio signal on the fall equinox.

"No, just some New Yorkers marking the fall equinox," she said.

The fall equinox had come and gone two months before.

Till sometime between tomorrow morning and the fall equinox.