The Seasonal Moment of Equinox @ EarthGaia (as our Planet may be named[i]), will occur March 20th at 21:24 UTC (that’s “Universal Time” as it is named – measured at Greenwich England). Equinox is a moment of balance of dark and light for the Planet, when the dark and the light in the South and in the North of our Planet are of equal length – for a moment. From this moment on, the Southern Hemisphere will tip into increasing dominance of dark after the dominance of light for six months – thus it is Autumn Equinox, and the Northern Hemisphere will tip into increasing dominance of light after the dominance of dark for six months – thus it is Spring Equinox.
At my place East Coast Australia, where it is the Season of the Autumn Equinox, the actual Moment occurs at 7:24am on March 21st (plus 1hr for NSW and Victoria). All global times for the actual Moment are here: archaeoastronomy.com