Finding my old iPod has led to me going through my old music library, ensuring that I have a local, not streamed digital copy of music that matters to me, and also notable music from my youth. I have gone so far as to hook up an old DVD drive to my mac, so I can rip stuff from the big box of CDs in my garage.
I must admit to finding some GLARING omissions on my part. I didn't have a copy of Groove Is In The Heart by Deee-Lite? Outrageous.

I'm now going through billboard charts for each year of my life, just eyeballing them to see if there's any notable songs that I'm missing. This has shown up some songs that I would have said were around many years, if not decades apart, when it fact this was not the case.

The 1970s was a weird-ass time, full of songs that you I would swear were from the 50s, and also songs that I would swear were early 80s new wave or post-punk.

My sense of time is clearly tied to genre.

Not to mention some oddities that only resolve themselves when you remember context. "Why the hell was Bohemian Rhapsody charting in 1992? ... Oh, right. Party on, Wayne.”
@jsr no that movie only came out about fifteen years ago, right ? …… right ?