View Google Calendar offline

In addition to offline access to Gmail while you're traveling or without a strong internet connection, you can now see your Google Calendar events when you're disconnected. Offline Calendar lets you view your existing schedule and events, but not edit them, so you don't have to print out calendars the night before a trip. This feature has been available to businesses and schools using Google Apps for about a month; we're now turning it on for everyone.


Official Gmail Blog: View Google Calendar offline