On April 17, 1965
The Mattachine Society of DC organized first official protest at the White House by a gay rights group. Foe a look at one of its newsletters, The Insider, from 1966, see the pdf copy by clicking here. Its pretty inventive what could be done with a typewriter back then. It's also noteworthy that all of the members were referred to by first name and last initials only. It was, of course, another time from which we've all come a long way in 44 years. May the Faerie's rest Harry Hay's soul!
For more on the history of the Mattachine Societies, see the excellent article by our family encyclopedia, qlbtq .