I am trying to expose Salesforce Public Calendar on to Force.com Site. I performed the below:
 Updated the Public Calendar Sharing Settings to include "Salesforce Calendar Site Guest User".  Enabled the VF Page for the Site.
 The VF page (exposing the Public Calendar) when accessed via a Tab with in the Application works fine.
 In "Public Access Settings" I do not find any object pertaining to Calendar. I could not assign access permissions for the Profile.
 When Previewed as Admin it throws the below Error:
Authorization Required Page not allowed for profile:/sfcalendar/00U/c
 Enabled the Debug Logs for the Site User and found the below:
28.0 APEX_CODE,DEBUG;APEX_PROFILING,INFO;CALLOUT,INFO;DB,INFO;SYSTEM,DEBUG;VALIDATION,INFO;VISUALFORCE,INFO;WORKFLOW,INFO 13:14:41.027 (27034000)|EXECUTION_STARTED 13:14:41.027 (27087000)|CODE_UNIT_STARTED|[EXTERNAL]|066G0000001xnF1|VF: /apex/Unauthorized 13:14:41.104 (106363000)|CUMULATIVE_LIMIT_USAGE 13:14:41.104|CUMULATIVE_LIMIT_USAGE_END
13:14:41.106 (106403000)|CODE_UNIT_FINISHED|VF: /apex/Unauthorized 13:14:41.106 (106413000)|EXECUTION_FINISHED
Questions: Is Public Calendar Accessible via Force.com Sites? What settings should I check further?