December 1

The Ford Motor Co. introduces the continuous moving assembly line which can produce a complete car every two-and-a-half minutes - 1913
 
Kellogg cereal adopts 6-hour day - 1930
 
African-American Rosa Parks refuses to go to the back of a Montgomery, Ala., bus, fueling the growing civil rights movement's campaign to win desegregation and end the deep South's "Jim Crow" laws - 1955
 
United Garment Workers of America merge with United Food & Commercial Workers Int’l Union - 1994
 
Metal Polishers, Buffers, Platers & Allied Workers Int’l Union & United Rubber, Cork, Linoleum & Plastics Workers of America merge with Int’l Brotherhood of Boilermakers, Iron Ship Builders, Blacksmiths, Forgers & Helpers - 1996