José Argüelles, born Joseph Anthony Arguelles (/ɑrˈɡweɪ.ɨs/; Rochester, Minnesota January 24, 1939 – March 23, 2011), was an American author and artist. He was the founder of Planet Art Network and the Foundation for the Law of Time. He held a Ph.D. in Art History and Aesthetics from the University of Chicago and taught at numerous colleges, including Princeton University and the San Francisco Art Institute. He was the twin brother of poet Ivan Argüelles. As one of the originators of the Earth Day concept, Argüelles founded the first Whole Earth Festival in 1970, at Davis, California. He was most famous for his leading role in organizing the 1987 Harmonic Convergenceevent and for inventing the Dreamspell calendar, in which 1987 is the year one.