Can search engines like Google find my calendar?

Search engines like Google will find your calendar only if you place a link to the calendar on a webpage that is available to the public over the internet.  Be sure to set any categories you wish to keep private to category options B, private to all logged in users or C, private to a selected list of logged in users.  The B and C options will require users to log in with their secret password to view events in these categories.