Earth is wobbling and days are getting longer — and humans are to blame

[George²]

What was the original rotation time in terms of comparative hours? 4 hours no?

It is certain that the Earth rotated faster in the past. We don't have enough complete and accurate data on all the influencing factors to slow the rotation, nor even an exact date for the formation of the Moon. So, all the numbers we use are approximate. The error increases progressively, depending on how far back we try to "look", the more we assume than we actually know.