-
10,000 BCE
Sunrise/Sunset
-
3000 BCE
Obelisks (Egyptians)
-
300 BCE
Sundials (Babylonia),Water Clocks (Greeks and Egyptians), and Burned Ropes (China)
-
1000
Hourglasses (Europe)
-
1300
Mechanical Clocks (Europe)
-
1400
Watches (Italy)
-
Greenwich Mean Time
-
Universal Time Coordinate