Most nostalgic/bittersweet farewell you've had so far?

Whether it be leaving a job you love, leaving school, moving out from your hometown, or even saying goodbye to a deceased. What was your most heartfelt experience saying goodbye?

Mine (SO FAR) was probably graduating college. Most nostalgic moment ever. A lot of things culminated into my senior year, and it felt not just a goodbye to college but adolescence and childhood in general.

I had never seen Scrubs but when I wandered around the Internet and saw the series finale with the final scene, I think that’s the best analogy.