From RobLa

It depends on when you were born as to what constitutes "Oldies". I remember listening to Prince before the Purple Rain soundtrack came out. The Billboard Top 40 provides a good benchmark for what was popular in the 1970s and 1980s, but the 1950s and 1940s were considered "oldies" when I was growing up. I'm still somewhat in denial about the music of the 1990s being "oldies", but I accept that people born when Kurt Cobain was alive aren't exactly "kids" anymore.