I was reading a book (Simon Stålenhag's Tales From The Loop) on my lunch break, hoping to catch a package delivery, when a particular passage mentioned the narrator recognizing a particular memory as being the first time he experienced nostalgia. It was interesting to me: normally one focuses on the past they felt nostalgic for, but in this instance it was a reflection on a past feel of nostalgia.
I struggle to think of what my first feeling of nostalgia was, but I among the earliest came about from watching a Charlie Brown and Snoopy cartoon where they gi looking for the farm they bought Snoopy from. They find life has moved on and the a parking garage now stands in its place. The line, referencing some intellectual (whose name is lost to me) struck a chord in my young, displaced mind: "I guess [they] were right; you really can't go home again."
So, do you remember your first nostalgic moment?