The given coordinates are a good place to check the time but you won't find a cache hidden here.
The cache can be found at S34.90xxxx E138.57xxxx with the times and dates providing numbers replacing the 'x's'.
12:34
12:34:56
12:34:56 PM
12:34 PM
12:34
11/12/13
Dec 13
Dec 13
The cache has been moved slightly. Rather than changing the puzzle the final coords are provided in the geochecker