As an Admin, you can add a new user and give them access to view the internal calendar only. The user will be able to hover over the events to see additional event information like other users; however, there is no hyperlink to the event itself. Therefore, they cannot drill down into the event to view the setup, occurrences, history, etc.
To add a new user with "Calendar View Access Only", go to Settings > Basic > Users, then select "Add New User". Enter the user's first and last name, email, and then under "User Access Permissions", enable "Calendar View Access Only" (see image below), then go to "Location Permissions" to enable their location(s) permissions and SAVE.
Once this option is checked, the user will be able to login and VIEW all the calendars (and schedulers) only. Any ability to “create” an event has been removed, and all left-hand navigation has been removed.
NOTE: If you do NOT see the "Calendar View Access Only" option within User Permissions, please un-check "Has Access to the Event Scheduler".