This cache is a challenge cache, meaning: It is at the posted coordinates, even though it is an "unknown" cache type. You are not allowed to log a find without proof that you qualify by completing the caching related "challenge" below. , For this challenge, you must have found a cache on each date in December, you need a find on December 1st of any year, and one on December 2nd of any year, etc, Check Your Statistics to see if you qualify.