middle age starts By YeboiAIDs Period: 500 to Dec 31, 1300 middle ages Period: Jan 1, 1301 to Dec 31, 1700 renaissance Period: Jan 1, 1701 to Dec 31, 1899 industrial revolution Period: Jan 1, 1900 to Dec 31, 1999 modern world Period: Jan 1, 2000 to Sep 5, 2019 21st century