Besides school ground squirrel killing contests, there was actually such a thing as Ground Squirrel Killing Day. The Board of Supervisors in Modoc County, California, designated June 9, 1918 as county Ground Squirrel Killing Day. Every man, woman, and child was expected to spend the entire day getting rid of those destructive pests.
All of this surprising information was found in the June 3, 1918, Modoc County Record. That was 99 years ago and times have changed. Although, not as quickly as one would imagine. Animal killing contests were banned in California in 2014.