If someone knew almost nothing in the world but trivia relating to popular music for the past 100 years, that would make a HELL of a good grid over which to lay other things. And I don't think a thorough knowledge of pop music (in any culture or language) over this particular past hundred years, which saw the proliferation of recorded music available in homes, the advent of radio broadcasts, movies with music, television variety shows, transistor radios, cassette players in cars, CDs, iPods and cell phones that store a ton of music could help but create a timeline of the culture. Wouldn't songs from Marx Brothers or Fred Astaire movies remind people of The Great Depression? Can anyone hear big-band swing music and not also think of the hairdos and costumes? Does "Boogie-Woogie Bugle Boy" not remind anyone of WWII? Knowing some of the context of Gene Autrey and Roy Rogers brings up LOTS of stories about where those songs were first heard.
The lyrics of some of the songs make specific mention of historical events, and that could help dating things, too, if a person were trying to figure out what came first.
Any hobby delved into deeply becomes another portal to the whole world—real and imagined; past, present and future.
video from Young Frankenstein, 1974
Directed by Mel Brooks
Written (in part) by, and starring, Gene Wilder