The CHALLENGE is to find/have found a cache on the 31st of all the months that have 31 days--there R only 7 !
Jan-Mar-May-July-Aug-Oct-Dec
U may find this cache at anytime & sign--(not FTF) BUT do not log as a find& until U qualify for this challenge
Verify: I can easily check your personal stats/geo-calender
PERMISSION GRANTED !! FTF: di75duo & alldatndensum