Yes, they are the only true clock perhaps;
With the Sun and Stars?
Otherwise it's just hearsay?
According to Genesis One they were meant for time keeping. And it was created perfect.
With a study of Saros Eclipse cycles you can find authentic mistakes in the orthodox historical chronology.
There are astronomical clues coded into the New Testament, but to see that I think you have to do a very close reading.
http://chronologia.org/en/seven/1N03-EN-134-166.pdf