Time in Haskell

What's the best way of handling time and date values in Haskell?  I did it once, but I had to use a horrible mix of timestamps, UTC time, local time, and convert all the time:

import Data.Time.Format (formatTime)
import System.Locale (defaultTimeLocale)
import Data.Time.Clock.POSIX (getPOSIXTime, posixSecondsToUTCTime, utcTimeToPOSIXSeconds)
import Data.Time.Clock (addUTCTime, diffUTCTime, UTCTime(..))

The timestamps are for serialization to a file (or perhaps I'm using a SQLite DB).

Any nice Hackage packages or some super module that can handle everything?  Well, for my current project I only need conversion to UNIX timestamps and some kind of parsing perhaps.

It's actually not too hard to think about. Haskell is a functional scripting language, which means that it relies on function invokations to drive computation. A function like GetTime will always return a different value upon each invokation, so therefore Haskell cannot be used to get the current time.