Philip Zimbardo is a great author that wrote the book "Time Cure, Overcoming PTSD".
I have included in this post multiple videos that shows the key concepts of his view on the psychology of time.
The Ted Talk: The Psychology of time (7-min).
RSA Animate: The Secret Powers of Time (10-min).
RSA Animate: The Secret Powers of Time (41 min.)
For people with PTSD or CPTSD, you can watch this video at 35:42 where he talks about using the time therapy.