Google Calendar is currently down for maintenance. Users are unable to access their Calendar as the service is currently not working for many users.
In the the company’s app status page, Google says that, “We're aware of a problem with Google Calendar affecting a majority of users. The affected users are unable to access Google Calendar. We will provide an update by May 6, 2010 9:45:00 PM UTC+5:45 detailing when we expect to resolve the problem. Please note that this resolution time is an estimate and may change”.
Though Google has informed earlier, but right now user’s complaints are streaming in on Twitter .
Update: Service is up now.