I don't know how weird this is, but I can remember things from my past that even the people I shared those moments with can't recall. I correspond regularly with a few old HS classmates (from 23 years ago) and they are constantly astounded at the things, even whole conversations, I can recall.
I was conacted by an old GF a year ago (it'd been 17 years since either of us had seen or even spoken to each other) and we sat and talked for nearly 6 hours on the phone about "the old days". I could recall everything about our time together with crystal clarity, and she was blown away by the things I brought up, many of which were extremely trivial.