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

It doesn’t matter as long as the sun lines up on the summer and winter solstice (longest and shortest day of the year.) If it doesn’t, then that means the seasons are all out of whack.