CACHE IS LISTED AT THE ABOVE
To log this cache you need to find 100 caches on 10 different dates. This does not mean you have to find 100 caches on 10 different days. If you found 50 caches on July 1st 2010 and 50 caches on July 1st 2011...then your July 1st date would count as one date over 100.
Looking at your statistics here is an example of what it may look like:
You may find this cache prior to qualifying. Just sign the log and write a note on the cache page of your current 100 date status. Then when you qualify you may claim the find on the cache.