New Aeon was a term that was used by Crowley and some of his followers to describe a two thousand year cycle.
This particular cycle commenced in 1904 following his illumination through the entity Aiwaz.
Aleister Crowley had claimed that his new cosmology installed him as the personifacation of the magical child, Horus.
ALEISTER CROWLEY, the history of Aleister Crowley
NEWAEON, term used by crowley to describe a cycle
EQUINOX, a series of books published by crowley