Review the Share Options
7. So, Do This: Edit the Share Options
Share with: Type the email address for one of your Contacts.
Calendar: Charlotte's Website.

And Do This: Review the Share Options
Sharing a Calendar is "By Invitation, Only."

What Do You See? The invitation presents two levels of permissions: Full details and Editor.

Editor allows people to work with this Calendar. An Editor can add, edit and delete Events.

Full details allows people to Read all of the information, however they do not have permission to add or change anything.

Keep going...

Calendar->Share->Share This Calendar