Is time subjective or objective?
Aristotle from Estagira (IV century b. C.), Emmanuel Kant (XVIII century) and Albert Einstein (XX century) are three very influential theorists who offered their opinions about time. These thinkers have had many followers throughout history.
1) For Aristotle time depends on a consciousness that records it. Subjective time.
2) For Emmanuel Kant, space and time are a priori categories of knowledge. They are subjective.
3) For Albert Einstein the distinction between past, present and future is only a persistent stubborn illusion. Subjective time.
4) The truth is that the magnitive time is: objective, imperceptible and measurable. Imperceptibility makes some people think that time is subjective. But to be measurable (clocks) time must be objective.
The passage of time manifests itself in changes, material deterioration and aging.