April 21 - ​New York
                    Members of the Mattachine Society stage a "sip-in" at the Julius Bar in Greenwich Village, where the                     New York Liquor Authority prohibits serving gay patrons in bars on the basis that homosexuals are                     "disorderly." Society president Dick Leitsch and other members announce their homosexuality and                     are immediately refused service.

                    Following the sip-in, the Mattachine Society will sue the New York Liquor Authority. Although no laws                     are overturned, the New York City Commission on Human Rights declares that homosexuals have                     the right to be served.

          National
                    Huey Newton, founder of the Black Panther Party, welcomes the gay liberation movement as part of                     the struggle for human emancipation.

George Birimisa

          National
                    The North American Conference of Homophile Organizations, an umbrella organization consisting of                     homophile groups from around the country, including the Mattachine Society, Daughters of Bilitis and                     ECHO, forms. It helped fuel activism until the Stonewall riots shifted activism into a more radical                     approach.

President Lyndon Johnson 

 State equality and discrimination bills

          National
                    The American Lutheran Church (ALC) releases its first statement on sexuality at its biennial                     convention.

          Oregon
                    The Oregon Supreme Court upholds the sodomy convictions of a Gay male couple who had been                     reported to police by a neighbor.

          New York
                    George Birimisa's first produced play, “Degrees” a portrait of a gay relationship, premiered at                     Theater Genesis in the East Village, Manhattan.

          April 19 - ​National
                    The oldest collegiate student organization for gays, the Student Homophile League, is founded at                     Columbia University.

          California
                   
“Lesbian” is heard for the first time in a Hollywood movie, The Group.

          National
                    Benjamin, Harry Publishes "The Transsexual Phenomenon" Reprinted in: Sexual metamorphosis: an                     anthology of transsexual memoirs / edited by Jonathan Ames.

          California
                    First transgender public uprising at San Francisco’s Compton’s Cafeteria

          National
                    George Baxt publishes “A Queer Kind of Death”

          National
                   Lucius Beebe a writer, historian, and social activist died leaving a long list of publications and writing.                    He was survived by his husband that he had built a life with throughout the entirety of their lives. 

United States LGBT History for 1966

          California
                    The world's first the transgender organization, the National Transsexual Counseling Unit, was                     established in San Francisco..

          ​National
                   Time Magazine publishes an anonymous two-page story entitled "The Homosexual in America". The                    article attacks homosexuality as "a pathetic little second-rate substitute for reality, a pitiable flight from                    life. As such it deserves fairness, compassion, understanding and, when possible, treatment. But it                    deserves no encouragement, no glamorization, no rationalization, no fake status as minority                    martyrdom, no sophistry about simple differences in taste-and, above all, no pretense that it is                    anything but a pernicious sickness." 

Lucius Beebe