Is there a way to share my ICAL Birthday calendar?

I have my family birthdays in my contacts and Apple creates a wonderful Birthday Calendar. I would like to give my wife access but the normal sharing is disabled. The only option is to publish it and I don't have a server.

I have spent several hours looking for a solution. I have drop box and goole drive, and can't find a way to use that as a place to publish it.

When I use search engines I don't find a good answer. How can something so simple be so difficult? I appreciate any suggestions...