When they made the first clocks, how did they know whether they were accurate?

Question

They had nothing to compare the clocks against, and I don’t think the stars and the sun would have made an useful target for comparison.

In: 17

Answer 1

> I don’t think the stars and the sun would have made an useful target for comparison.

But they are. You can spot noon fairly easily by observing the sun. When the sun is in the highest point in the sky, then it is noon, and someone can mark the time. Instruments for determining the sun’s position in the sky have been around for ages.