Sabazius X*, National Grand Master of United States Grand Lodge of Ordo Templi Orientis posted the following Equinox message:
“Greetings of the September (southward) Equinox, when the sun crosses the projection of the earth’s equator into the southern hemisphere, and enters the sign of Libra. According to NOAA, it is the beginning of astronomical autumn in the Northern Hemisphere, although meteorological autumn begins on September 1. The Celtic tradition, however, holds that the autumnal equinox is not autumn’s beginning, but its midpoint; and Lughnasadh (Lammas), in August, is its beginning.
“The moment of Equinox occurs today at 14:21 UTC, which is 7:21 AM PDT for those of us on the U.S. west coast. Frater IAO131 explains the basic significance of the autumnal equinox within the context of Thelema at the link provided and includes a suitable dramatic ritual. https://iao131.com/2012/09/24/the-rituals-of-the-elements-autumn-equinox/