Geohashing Challenge Mystery Cache

No the title isn't mis-spelled, this is indeed a geohashing challenge. A geohash is computed using the algorithm below:

The cache is not at the posted coordinates, but is placed within two miles and I was at a geohash point while placing the cache. You should be able to figure out the coordinates based upon that information.

The Challenge
Geohashing is meant to be a sort of spontaneous adventure generator. Every day's locations are different and the effort required to reach the locations can vary greatly. In order to complete this challenge and log this as a find, you must find a geocache within 1km of any of that day's geohash locations. In other words, the date that you visit the geocache must match that used in the geohashing algorithm and that point must be within 1km of the cache visited. Note that every lattitude/longitude combination has a corresponding geohash location and that for every day there are thousands of different geohash locations throughout the world (64,800 to be exact).

• Previous finds can count as long as they correspond to geohash location for the day that cache was found. The algorithm allows one to calculate geohash locations back in time.
• Re-visiting a previously found geocache that is <1km from any particular day's geohash and posting a suitable note is acceptable.
• Indicate in your log the qualifying geocache visited, the associated geohash location and the distance between. This should be in the format GC*****, YYYY-MM-DD:LAT:LON, Distance.

The Cache
Since the concept of Geohashing originated from the webcomic, xkcd, I felt it appropriate to leave a bunch of xkcd swag in the cache. The cache container is a painted olive jar hidden among the brush/rocks. Enjoy your random adventure!

Hall of the Victorius
Kudos to all who complete this geohashing challenge.