[Haskell-cafe] Fuzzy time deltas

Hey all, Is there a library that supports fuzzy time deltas? For example, given two UTCTimes (or something like that) it could produce: 43 seconds 13 minutes 17 hours 4 days 8 months I want to use it for the news feature on Haskellers. It's not that hard to write, just wondering if it's already been done. Michael