October 10

Six days into a cotton field strike by 18,000 Mexican and Mexican-American workers in Pixley, Calif., four strikers are killed and six wounded; eight growers were indicted and charged with murder - 1933
And this:

October 10, 1933 - About 18,000 cotton workers went on strike in Pixley, California. Four were killed before a pay hike was finally won.
Read more about the cotton strike and the lives of California farm workers in the 1930s at
http://www.farmworkers.org/strugcal.html and
http://clnet.ucla.edu/research/chavez/themes/ufw/history1.htmlLabor history found here:
http://www.unionist.com/big-labor/today-in-labor-history & here:
http://www.workdayminnesota.org/index.php?history_9_10_10_2011