zzxxee - I am never sure about the concept of GHD - is it supposed to be representative of good things or something which reminds one of failings/problems?
I can't think of any day in particular I'd like to re-visit althoug if we're talking family wise, I'd like to see my grandfather just before he passed away. He had cancer and was given a few weeks to live and I would go a visit him every other day. I just regret that I wasn't there the day he died.