Early Egyptians told time by the shadow cast by the sun on an unmoving object.
Period: 3000 BCE to
3000 BCE-1972
325 BCE
Early Greeks and Egyptians used a water dial.
300 BCE
Babylonians started using a sundial. It was essentially a flat circle with a 12-hour clock face.
Jan 1, 1001
Europe used an hourglass to tell time.
Jan 1, 1300
The first mechanical clock appeared in Europe.
Jan 1, 1301
Hourglasses were used in law courts.
Jan 1, 1400
Watches appeared in Italy.
A pendulum was added to the clock to make it more accurate.
Railway companies in the U.S, Canada and Great Britain had divided the land into time zones. Each zone operated under its own time.
International Date Line was established. This is an imaginary line drawn through the Pacific Ocean on or near the 180th meridian.
Time was measured by Greenwich Mean Time. The time in each time zone was approximately 1 hour later than the time zone to the west and 1 hour earlier than the time zone to the east.
Time zones were standardized.
Standard time was invented.
In an attempt to make the most of daylight hours, Daylight Savings was introduced.
Universal Time Coordinate was adopted around the world as the official measure of time for the planet.