1910. The name of the harvest festival has changed many times over the years, and is currently called, simply, Harvest Daze. See also North Central Colorado Urban Area Platteville Atmospheric Observatory References External links Platteville Website Portal style website, Government, Business, Library, Recreation and more City-Data.com Comprehensive Statistical Data and more about Platteville CDOT map of the Town of Platteville Towns in Weld County, Colorado Towns in Colorado 1871 establishments in Colorado Territory