It's a funny thing to talk about - Time, very opinionated in general.
Whenever a discussion about something regarding the past occurs, We hear or say that "I don't remember, it was a long time ago. ".
I think that it's either good memories, memories that make you happy, make you laugh, make you learn something and we hold on to them or it's those bad memories that we choose to forget and leave in past, they don't mean anything .
Just had to let it out. :)