Time is the perception of any isolated consciousness that observes the process of life (or being) from a particular fixed personal vantage point which it has decided to limit itself to...for what it would call "the time being". Earth time is a derivative of the movements of the planet on its axis in regards to the sun, one day being a full rotation, one hour being an arbitrary measurement based on dividing that day into 24 equal parts. Most people live by that system of awareness. A few do not. One could just as well live by a 100 hour system or a 4 hour system, if one chose to.

The one element of fact in the whole matter is this: it does take one full "day" for the Earth to complete one rotation on its axis (under normal conditions). If some other factor (such as a passing heavenly body with a strong gravitational field) caused the Earth to slow down or speed up its rotation, of course, the relative length of the day would change...and this would produce some interesting changes in human consciousness.

Some people might find it enlightening, while others found it unbearable. Still others might take only slight notice of it. Such are the wide variances in human awareness.