My iPhone is not allowing me to set up to a calendar - it is saying can't connect using SSL?

My iPhone is not allowing me to set up to a calendar - it is saying can't connect using SSL? - 1

This means whatever Calendar your using is not accepting SSL connections. Then only TLS

TLS can't be used on smartphones or ARM processors only SSL

And there was a recent White Paper advising many sites to disable SSL Servers do to a compromise it in called POODLE.
http://www.symantec.com/connect/blogs/ssl-30-vulnerability-poodle-bug-aka-poodlebleed