soup, I don't know the answer to your question, but I suppose the context of the memory puts it in a time frame.

I also want to share with you that when my father died, I had all kinds of memories surface for quite a while afterwards. Not unpleasant memories. So I wondered, where had they been all this time?

Our minds are so amazing.

Where "are" the memories until they are evoked? Where do the come from? How are they evoked? What is that process? So amazing!