What is time? A basic but important question. More important is not just understanding some basic definition of it, but it's interconnection with matter and what that means for us.
One basic definition of time is: The system of those sequential relations that any event has to any other, as past, present, or future; indefinite and continuous duration regarded as that in which events succeed one another.
Look at that definition again and think about our basic concept of cause and effect. Remember one of our C&E rules: