Eli5: If millions of years ago a day had only 22 hours, does science count those years differently, or is the standard always 24 hours? Aren’t we then missing a few years which we need to add up?

Question

Eli5: If millions of years ago a day had only 22 hours, does science count those years differently, or is the standard always 24 hours? Aren’t we then missing a few years which we need to add up?

In: 7

Answer 1

Science when talking about long lengths of time talks about years which are based on the length of time to revolve around the Sun a change in the length of days doesn’t alter this.