Back in the day, people had creative ways of telling time. They used things like sundials, water clocks, and candle clocks. But the first mechanical clocks, the granddaddies of today’s timekeepers, appeared in the 14th century in European monasteries. These clocks were large and often installed in church towers. They didn’t exactly fit on your nightstand!

As time passed (pun intended!), clockmakers started tinkering and inventing new kinds of clocks. The pendulum clock came along in the 17th century, adding a swinging weight to regulate time more precisely. Fast forward to the 19th century, and we got the invention of the pocket watch – a clock you could carry with you! Then, the 20th century brought us the electric clock, and eventually, the digital clock we commonly see today.

Evolution of Clocks & Types

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Oldest operating clock in Prague. Source: Buyoya

Sundials and Water Clocks:

  • Sundials: The earliest sundials date back to ancient civilizations, with evidence suggesting their use in ancient Egypt around 1500 BCE. Other cultures, including the Greeks and Romans, also employed sundials.
  • Water Clocks: Water clocks, or clepsydrae, were used in ancient civilizations such as China and Egypt. The oldest known water clock dates back to ancient Mesopotamia, around 1500 BCE.

Mechanical Clocks:

  • The first mechanical clocks emerged in the 14th century. The earliest known public mechanical clock is the clock at the Salisbury Cathedral in England, built around 1386.

Pendulum Clocks:

  • The invention of the pendulum clock is credited to Dutch scientist Christiaan Huygens in 1656. His innovation greatly improved the accuracy of timekeeping, making clocks more reliable.

Pocket Watches:

  • The concept of portable timekeeping became popular in the 16th century, and the first true pocket watch is often attributed to Peter Henlein, a German locksmith, around 1510.

Electric Clocks:

  • The development of electric clocks occurred in the late 19th century. Alexander Bain, a Scottish inventor, created one of the earliest electric clocks in 1840.

Digital Clocks:

  • The first digital clock was built in the 1960s. The technology became widely used in the latter half of the 20th century with the advent of electronic components and displays.

Cuckoo Clocks:

  • The cuckoo clock has its roots in the Black Forest region of Germany in the 18th century. Franz Anton Ketterer is often credited with creating the first cuckoo clock in the 1730s.

Atomic Clocks:

  • The development of atomic clocks began in the mid-20th century. The first practical atomic clock, based on the vibrations of atoms, was built by Louis Essen and Jack Parry in 1955.

Smart Clocks:

  • Smart clocks are a product of the digital age and the rise of technology in the 21st century. With the advent of smartphones and smart devices, clocks became integrated with advanced features, connecting to the internet and offering multifunctional capabilities.