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History of Time

By facebooker_10157862994603066
  • 3500 BCE

    Ancient Egyptian obelisks

    Ancient Egyptian obelisks
    Ancient Egyptian obelisks are used as shadowclocks to tell time
  • 1500 BCE

    Ancient Egypt Sundials

    Ancient Egypt Sundials
    Egyptians used the oldest sundial
  • 270 BCE

    Mechanized Water Clocks

    Mechanized Water Clocks
    Water clocks, or clepsydrae, were used in Ancient Greece.
  • 328

    Persians use waterclocks

    The Persians use water clocks to determine the longest and shortest days and to determine holy days.
  • 501

    Incense clocks

    Incense clocks
    Incense clocks are first used in China.
  • 520

    Candle Clocks

    Candle Clocks
    The earliest mention of candle clocks comes from a Chinese poem, written by You Jianfu.
  • 976

    Use of mercury in waterclocks

    China replaces the water in a water clock with mercury for greater accuracy.
  • 1001

    First gear clock

    The first geared clock is invented by an Arab engineer named Ibn Khalaf al-Muradi.
  • 1493

    Clock towers

    Clock towers are made and used in Western Europe during the Middle Ages.
  • 1501

    The hourglass

    The hourglass is used as the first dependable, reusable, accurate, and easily constructed time-measurement device.
  • 1571

    Wrist Watch

    The first wrist watch is gifted to Elizabeth I of England from Robert Dudley
  • 1580

    Pendulum Clock

    The Italian Galileo Galile discovers the swing of a pendulum may be used to regulate a clock.

  • Pocket Watch

    Pocket Watch
    Huygens and Robert Hooke invented the spiral balance which allows accurate pocket watches to be made.

  • Electric Clock

    Sir Francis Ronalds of London creates the electrostatic clock.

  • The atomic clock

    The first accurate atomic clock is built by Louis Essen in the UK.