I\'m experiencing a 403 forbidden error when trying to retrieve a google public calendar feed using fullcalendar. I notice the problem also exists on fullcalendar\'s demo is thi
Google has deprecated and shut down Calendar API v1 and v2. The "public/full" URL is no longer available.
FullCalendar is being updated to support API v3. Once released you will be able to use a v3 style URL. First create an API key in Google Developer Console (https://console.developers.google.com). Then use the following for the URL in FullCalendar, substituting your calendar ID and API Key:
https://www.googleapis.com/calendar/v3/calendars/{YOUR_CALENDAR_ID}/events?key={YOUR_API_KEY}
The developer commented in the issue that the changes should be released tomorrow (Nov 19th). You can find more details and track the progress in this issue:
https://code.google.com/p/fullcalendar/issues/detail?id=1526&colspec=ID Type Status Milestone Summary Stars