In olden days, they allowed people to tell the time.
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There is no specific date stated as to when sundials were first used.
Sundials were used to tell time, back without watches.
no because its not like a clock in our days.
Sundials are usually labelled using Roman numerals, so the X would represent 10 o'clock. As sundials tend to work best with sunlight, 10pm would be dark, so the X would represent 10am.
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