Western Carolina had a pretty cool show about time this past year (you can find it on YouTube), that might give you some ideas. Maybe songs such as "Time After Time" (Cyndi Lauper), "The Best of Times" (STYX), "Too Much Time on My Hands" (STYX), "Final Countdown" (Europe), "Clocks" (Coldplay), "Time in a Bottle" (Jim Croce), "Time" (Pink Floyd), "Time Stand Still" (Rush), "Out of Time" (The Rolling Stones).
This is an interesting concept, and I think if done well it could be really fun.