EQUINOX
Term used to refer to the two days each year, one in spring (usually around 20 to 23 March) and one in autumn (usually around 20 to 23 September) in which day and night are of equal length. At the moment of the Equinox the Sun crosses the celestial equator – the projection of the earth’s equator into space.
In the Golden Dawn magical system the equinoxes are two of the most important days of the year because it is thought that on these days the spiritual energies of the Sun come to Earth directly.
Rituals are held to draw on these energies. Equinoxes are also significant in the pagan calendar of the year as festival days called Sabbats. The spring celebration is called Ostara and the autumn celebration Mabon.
SOURCE:
The Element Encyclopedia of the Psychic World: The Ultimate A–Z of Spirits, Mysteries and the Paranormal: The Ultimate A-Z of Spirits, Mysteries and the Paranormal – Written by Theresa Cheung – © Theresa Cheung 2006