Joseph Garner-The 100 Years Timeline By Li.jojo Jul 4, 1776 Decleration of Independence was signed. The decleration of Independence was signed. Period: Jul 4, 1776 to Aug 13, 1876 The 100 years Timeline Apr 12, 1787 Constitution was made Aug 13, 1865 Civil War ends May 8, 1876 The Americas Celebraed Their 100th Birthaday