First, go into your public profile.
Look along the top line and click on ''Statistics".
Scroll down until you come to "Finds for Each Day of the Year".
To find and log this cache, you need to have at least one find for each date in the year. i.e. Each square in the table should be filled in.
3 things to bear in mind, please:
# The cache is hidden outside the fenced area, but you will probably find it easier to reach from the inside.
# Although it has opening hours, in my experience, the location appears to be open all the time. However, if you find the location being used for its original purpose, please be respectful and come back another time, if appropriate.
# As I have chosen a novelty container, please treat it gently. I can't guarantee that the outer container is waterproof, so please put things inside the inner container.