Variance in ancient memories

I was just thinking back to when I made toad-in-the-hole in summer 1995 and found myself suspecting that those who were with me probably have no memory of it. There are many memories from years back, some of which concern others more than I, and, quite often, if I mention these past occurrences, those concerned have no recollection of them. For instance, somebody I'm no longer in touch with made me lasagne just a few years later, I wonder if they now recall. More generally, I wonder if others remember equally many things, mostly ones that I forgot, or if I remember more than most.