The Harmonic Convergence was the world's first synchronized global peace meditation, coinciding with an exceptional alignment of Solar System planets on August 16–17, 1987.
Timing of the Harmonic Convergence allegedly marked a significant celestial alignment of the Sun, Moon, and six planets as "part of the grand trine.
Shearer introduced the dates and the prophecy to Arguelles, and he eventually co-opted them and coined Harmonic Convergence to promote the event.
[citation needed] The Sun, Moon and six out of nine planets (note: Astrology continues to consider Pluto as a “planet.”) formed part of the grand trine, that is, they were aligned at the apexes of an equilateral triangle when viewed from the Earth.
"[4] Believers of this esoteric prophecy maintain that the Harmonic Convergence ushered in a five-year period of Earth's "cleansing", where many of the planet's "false structures of separation" would collapse.
Actress and author Shirley MacLaine called it a "window of light,"[5] allowing access to higher realms of awareness.