The point to remember is that there are three kinds of Time:
1 Physical Time: This is the time tat we measure and use in everyday life. It is believed to have started with the Big Bang. There was no physical time before the Big Bang. It is associated with changes. Its direction of flow is related to increase in entropy.
2 Conceptual Time: This is the time that we can entertain in our mind. This time can be extended before the Big Bang and after the end of the universe.
3 Psychological Time: This time’s rate of flow varies. Depending on whether you are having fun or are bold, you are young or old, this time may
Volumes have been written on Time from by poets, philosophers, and scientists;
From Ovid’s Tempus edax rerum (Time devours everything) and Hodgson’s (?) poem:
Time you old gypsy man
Will you not stay?
Put up your caravan
Just for one day?
All things I’ll give you
Will you be my guest?
Bells for your jennet
Of Silver the best?
To books like:
Bas Van Fraassen’s An Introduction to the Philosophy of Time and Space
G, J, Whitrow’s The Natural Philosophy of Time.