On this day in 1966, members of the gay rights organization the Mattachine Society staged a "sip-in" to protest gay people being refused service at bars.
This Day in History Class
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The "Battle of Alcatraz" begins - May 2nd, 1946
The world's first postage stamp is issued - May 1st, 1840
The first toy commercial airs on TV - April 30th, 1952