In order to claim this challenge, it's simple, you must find at least one unknown cache on the 1st day of each month! However, they do not have to be in the same year! But there needs to be a total of twelve finds!
When logging, please add the date and GC# for all twelve of your cache finds required.
Here's a template (obviously update the year and GC#):
Jan 01, YYYY GC#
Feb 01, YYYY GC#
Mar 01, YYYY GC#
Apr 01, YYYY GC#
May 01, YYYY GC#
June 01, YYYY GC#
July 01, YYYY GC#
Aug 01, YYYY GC#
Sept 01, YYYY GC#
Oct 01, YYYY GC#
Nov 01, YYYY GC#
Dec 01, YYYY GC#