American history. By Koiden Period: Jan 1, 1600 to Dec 31, 1699 1600 Period: Jan 1, 1700 to Dec 31, 1799 1700 Period: Jan 1, 1800 to Dec 31, 1899 1800 Period: Jan 1, 1900 to Dec 31, 1999 1900 Period: Jan 1, 2000 to Dec 31, 2099 2000