There's also another "Those Were The Days" -- the one that was used as the theme song for All In The Family:

Boy, the way Glen Miller played
Songs that made the hit parade!
Guys like us, we had it made --
Those were the days!

Didn't need no welfare state,
Everybody pulled his weight.
Gee, our old LaSalle ran great!
Those were the days!

And you knew where [who?] you were then:
Girls were girls and men were men.
Mister, we could use a man like Herbert Hoover again!

...

And the last verse is eluding my recall at the moment. (I.e., I can't remember it right now. LOL )

Anyway, maybe "nostalgia" songs is a slightly different category from "songs about remembering."