Steps to replicate :

1. Login to Confluence
2. Create a new calendar and tie it to the space named "TEST"
3. Create a new group named "confluence-test"
4. Create a user named testing and add it to "confluence-test"
5. Now grant space view permission for that individual user to the user named testing via Space tools >> Permissions
6. Login as the newly create user named "testing" and access the "TEST" space Calendar section.

Current Result : The user is able to add new calendar

Expected Result : The user should not be able to add new calendar since they only have view permission.