How did people accurately know what time is was when they first started with clocks?
When they made the first clock, how did they know what time it was? How did they set it?
Who invented the clock? Who invented clocks? What is clock? Who invented the time machine? How is the time on a Speaking Clock recorded? Is there an official clock in the world? Why was time created? When did we start measuring time in seconds? Who decided what duration will be one second? Why did we divide an hour in 60 minutes and a minute in 60 seconds? Why not 100 minutes or 100 seconds? How did this system come to exist? When did the modern era begin? What are the exact times in which hands of a clock divide it to three equal segments? Did time machine exist? What's the origin of the word o'clock? What if all clocks on earth were reset to 12 am, and no one remembered the exact time the event happened. Would we be able to get the old time back? What is the origin of the word o'clock? Where did time come from? What is the measure of the angle formed by the minute and hour hands of a clock at 1:50? Do clocks really measure time? What is the earliest recorded date, i.e. we could calculate that it was May 23rd year XXXX BCE and it was a Tuesday (for example)? What is clock in communication? Why was Daylight Saving Time invented? Special Relativity: Whose clock shows more time elapsed? Do clocks measure time or themselves? When was the snooze button first incorporated into alarm clocks? Why clock is used in digital circuits? What is it that makes a second a second in clocks (analog/digital)? What defines time in clocks? What is an atomic clock? How was the numeral system created? (And how to construct one) How many times does the hands of the clock overlap in a day? A clock is set right at 10 AM. A clock gains 10 minutes in 24 hours. What will be the true time when the clock indicates 3 PM the following day? At what time between 5 and 6 o’clock are the hands of a clock 3 minutes apart?