1847 - The Young Men's Debating Club, the origin of the Epsilon chapter of Delphic in Cortland, NY, is formed at the Cortland Academy.
1850 - The Delphic Society at Rochester, the predecessor organization to the Delphic Society at Geneseo, is founded.
1870 - The Baconian Society, the precursor organization to the Baconian chapter of Delphic in Potsdam, NY, is founded.
1871 - The Delphic Society, the origin of the Delphic Fraternity, is founded in Geneseo, NY on October 13, 1871.
1876 - The Baconian Society at Potsdam divides into the Francis and Roger Baconian Societies.
1889 - The Delphic Fraternity is formed with the addition of the Beta chapter of Delphic in Oneonta, NY.
1889 - Alpha Pi Nu, the origin of the Zeta chapter at New Paltz, is founded.
1896 - Kappa Delta Alpha, which helped form the Zeta chapter at New Paltz, is founded.
1897 - The Gamma chapter of Delphic is founded in Jamaica, NY.
1898 - The Delta chapter of Delphic in Mansfield, PA is founded.
1899 - The Young Men's Debating Club in Cortland becomes the Epsilon chapter of the Delphic Fraternity.
1899 - Alpha Pi Nu and Kappa Delta Alpha at New Paltz merge to form the Zeta chapter of the Delphic Fraternity.
1900 - Alpha Kappa Sigma society at Plattsburgh, NY becomes the Eta chapter of Delphic.
1906 - The Roger Baconian Society at Potsdam becomes the Baconian chapter of the Delphic Fraternity.
1951-1954 - The Zeta chapter of Delphic at New Paltz becomes the Alpha Rho chapter of Sigma Tau Gamma, a nationally recognized fraternity.
1962 - The Delphic Fraternity of New Paltz, Inc. is incorporated as a not-for-profit corporation in the State of New York.
1967 - Delphic at New Paltz attends a social convention in Oneonta of former Sig Tau affiliated chapters in NY.
1987 - The Zeta chapter of Delphic at New Paltz is re-established on March 11, 1987 as a multicultural fraternity known as Delphic of Gamma Sigma Tau.
1992 - The Delphic Alumni Association is formed at the Zeta chapter in New Paltz, NY.
1998 - Delphic of Gamma Sigma Tau Fraternity becomes a founding member of the National Multicultural Greek Council.
2003 - The Theta chapter of Delphic is founded in Binghamton, NY.
2004 - The Delphic Fraternity of New Paltz, Inc. becomes The Delphic Fraternity, Inc. and files a d/b/a as Delphic of Gamma Sigma Tau Fraternity.
2009 - The Kappa chapter of Delphic is founded at the University of Virginia in Charlottesville, VA.
2014 - The Tau Alpha and the Tau Beta graduate chapters are respectively formed in New York City and Washington, D.C.
2016 - Two associate chapters were formed at SUNY Delhi and Lincoln University in Oxford, Pennsylvania. On October 13, 2016, The Delphic Fraternity, Inc. became 145 years old.
2017 - The Delphic Fraternity Gamma Sigma Tau History e-Book: 145 years of Brotherhood, Over 165 Years of History, is published online.