The much anticipated Google Calendar API is now available. I can't wait to see the million innovative ways in which Google fans with use the API.
Developers may use the API to add or update new content to Google calendar or even search stored events.
Since GData feeds support queries based upon URL parameters, so it is possible to take a base feed, add parameters, and query for all entries that match a search query, fall within a date range, or other condition
Unfortunately, only desktop application can use theGoogle-specific authentication system - Proxy Authentication for Web Applications is not available yet.
Download Google Calendar Data API