July 22

Newly unionized brewery workers in San Francisco, mostly German socialists, declare victory after the city’s breweries give in to their demands for free beer, the closed shop, freedom to live anywhere (they had typically been required to live in the breweries), a 10-hour day, 6-day week, and a board of arbitration - 1886
 
A bomb was set off during a "Preparedness Day" parade in San Francisco, killing 10 and injuring 40 more. Tom Mooney, a labor organizer, and Warren Billings, a shoe worker, were convicted of the crime, but both were pardoned 23 years later - 1916