The "ET" number that we post on our car, why is it called a dial in?

I believe it stands for elapsed time, however in brackets it could be estimated time.

With these trivia questions, once the correct answer is posted I will acknowledge that answer. So, if the question is still open, it means we are waiting for the correct answer.

Still waiting for the correct answer.

because the clocks used to be manual (analog) and the dial had to be set.

Good job Mr Yellow ticket, you posted the correct answer. In the olden days!

Thanks!