To qualify to log this cache you will need to find a cache on every single day of the year including February 29th so that you will have filled in every block of your 'Finds for Each Day of the Year' matrix shown among 'Statistics' on your geocaching.com profile.
Here is mine as of 27th April 2014.
I will check your statistics when you submit your log.
Reasonably simple really and I suppose most of you would have completed the August month already.