When you hear an old favorite and it reminds you of a fun time in your life.

I reckon I have at least 1000 songs from the 60's and 70's that engender great memories
[b]Electric Light Orchestra - Shine a Little Love[/b] 1979
[youtube=https://www.youtube.com/watch?v=GJuTIxwQw0k&ab_channel=ELOVEVO]