November 30

1803 On November 30, 1803, Spain's representatives, Governor Manuel de Salcedo and the Marqués de Casa Calvo, officially transferred Louisiana to France. "Louisiana" was a large area including a section that would become the greater part of the State of Wyoming.

1868 Point of Rocks Post Office was established on November 30, 1868 in Carter County, Wyoming Territory.

Louisiana Purchase 1803
Platte County's Carnegie Library

1889 Keystone Post Office was established on November 30, 1889. Located southwest of Centennial, Keystone was a mining community that took its name from the Keystone Mining Company located there.

1917 Platte County's new Carnegie Library in Wheatland was opened to the public on November 30, 1917.