Monday, September 13, 2010

offline google calendar

The read-only offline version of Google Calendar is only useful to quickly check your agenda when you don't have an Internet connection. For more features, you should check Mozilla Sunbird, a cross-platform tool that can synchronize with Google Calendar using CalDav. Make sure to enable caching if you want to view the events from Google Calendar when you are offline (you still can't edit the events or create new ones)..
This is the last public Sunbird release by the Calendar Project.
We recommend upgrading to Thunderbird 3 and Lightning 1.0 beta2.

Calendar keeps you on time, even when you're not online. Offline Calendar allows you to access your events through your browser without requiring Internet access. It's perfect for flaky connections or for when you're in between meetings and have no idea where you're supposed to be next.

Enable offline access

Click the Offline link at the top of any Calendar page. You'll be prompted to install offline access to Google Calendar - click Enable offline access to begin the setup process. (Keep in mind that you must be connected to the internet during the initial offline installation.) During the installation process and for future synchronization, Calendar uses Google Gears to download a local cache of your events. As long as you're connected to the network, that cache is synchronized with Calendar's servers.

Please note that when you enable offline access on your computer, data is only stored on that particular computer, not on all the computers you use. Likewise, if you use someone else's offline Calendar-enabled computer, your calendar data will not be downloaded unless you specifically enable offline access for your own calendar on that computer.

How to access events while offline

To access your calendar when you’re not connected to the internet, you’ll need to have first enabled offline access. If you have the feature enabled already, type "" into your browser’s address bar or use the desktop shortcut (if you've enabled this shortcut during setup).

At this time, Offline Calendar works only on Google Chrome, Internet Explorer 6 and 7, Firefox 2 and 3, and Safari 3. Support for other browsers is coming soon.

Offline features

While offline, you can view event details for events on calendars you've selected to be available offline. Note that Calendar will be read-only - it won't be possible to create, edit, or delete events.

Offline Calendar uses Gears, an open source browser extension that lets developers create web applications that can run offline by caching and serving application resources locally.


Online and fully synchronized



Green icons indicate that you're online. The checkmark shows that your account is fully synchronized; this icon will remain green and spin while your events are synchronizing between your computer and our Calendar servers. The gray null sign indicates that you are offline.

If you lose connectivity while you're online, you will be prompted to switch to offline mode. You can change the current mode (e.g. switch back to the online mode when you re-connect to the internet) by clicking on the offline icon and selecting the appropriate option from the drop-down menu.
Get Started

If you're setting up Google Calendar Sync for the first time, you'll need to:

Check your compatibility.
Download Google Calendar Sync.
Agree to the Terms of Service and finish installation.
Select the appropriate Sync Option and time interval.
Sync Options

Google Calendar Sync offers three types of Sync Options between Google Calendar and Microsoft Outlook Calendar. Details for each option can be found here.

Set up Microsoft Outlook and other mail clients

If not all of your users are ready to use the Gmail web interface, you have the option of accessing your mail, calendar, and contacts from desktop programs such as Microsoft Outlook.

In this section, we'll cover how to configure and use desktop clients for use with Google Apps.

Sections include:
Microsoft Outlook 2003 and 2007 using Google Apps Sync for Microsoft Outlook
Mozilla Thunderbird, Outlook Express and other PC clients
Apple Mail and iCal
Optimizing and troubleshooting IMAP configurations
Note that Microsoft Entourage is not a supported client and is not covered in this section.

What client would you like to set up?

Select the client that you're interested in setting up.

Once you finish configuring a client, you'll have the option of returning here to set up another client.
Other Outlook configuration methods

If you'd like to configure Outlook without using Google Apps Sync for Microsoft Outlook, you'll need to use the Google Calendar Sync Tool for Microsoft Outlook and IMAP or POP to download mail.

Note that you can't sync contacts, access the shared contacts list, view free/busy information for other calendars or schedule calendar resources in Outlook without Google Apps Sync for Microsoft Outlook.

Do you want to use Google Apps Sync for Microsoft Outlook? (Premier and Education Edition Only)

Google Apps Sync for Microsoft Outlook allows some users at your organization to seamlessly continue to use the familiar Outlook interface, while the rest of your organization uses the Gmail web interface. As an administrator, you can either let users downland and install the plugin on their own, or deploy it to many users with an MSI.

The plug-in supports these features:
Email, calendar and contacts synchronization. For email, the plug-in uses the Offline Gmail protocol, which is much faster than IMAP or other methods.
Free/Busy lookup and Global Address List functionality, which makes it easy to schedule meetings with your colleagues, regardless of whether they use Outlook or Gmail.
Delegation of your email and calendar to others in your domain.
Integration with your single sign-on system if you have one.
Google Apps Sync for Microsoft Outlook is available to Premier and Education edition domains.

Install and use Google Apps Sync for Microsoft Outlook

Google Apps Sync for Microsoft Outlook is a plug-in for Outlook 2003 or 2007 that lets you keep using Outlook, after switching to Google Apps. All your mail, contacts, and calendar events are synchronized between your Google Apps profile in Outlook and your Google Apps account in the cloud. Data that isn't currently supported by Google Apps, including Outlook tasks, notes, journal entries, isn't synchronized. But you can still use these features in Outlook. (For complete information about working in Outlook with Google Apps Sync, see the Google Apps Sync help.)

Google Apps Sync can also be used to import Outlook data to Google Apps, which we discussed in Step 6. The next step in this section discusses how larger enterprises can deploy the plug-in to many users at once by pushing an MSI file.

How to do it

After installing the proper service packs, you can be up and running with Google Apps Sync in a matter of seconds.

Log in as administrator to your Google Apps Control Panel, and make sure the following services are enabled for your domain:

Enable Google Apps Sync for Microsoft Outlook for my users (Email Settings)
Google Calendar service (Calendar Settings)
User email uploads (Advanced Tools)
Enable Provisioning API (Users and Groups)

For details on enabling these services, see Administrator setup for Google Apps Sync.

Make sure each user's computer meets these Windows and Outlook system requirements.

Have each user install Google Apps Sync. They can optionally import their existing Outlook data, too. They should follow the instructions at Download, sign in, and import. (These instructions apply whether they're downloading the plug-in themselves, or whether you're pushing it to them in an MSI file.)

Users should now visit the Google Apps Sync help to find out what's different about using Outlook with Google Apps Sync, what they might need to set up in their Google Apps profile, and what isn't supported. They can begin at Get started with Google Apps Sync.
Users can also delegate access to their email and calendars by follow the instructions here.

Google Calendar Sync Tool for Microsoft Outlook

The Google Calendar Sync Tool for Microsoft Outlook will sync default calendars between Outlook and Google Calendar. Secondary calendars and resource calendars aren't synced.


Microsoft Outlook 2003 or 2007
How to do it

Download Google Calendar Sync (version at
Once a dialog box appears, click Save File. The downloaded file should open automatically. If it doesn't, manually open it from your browser's download window.
Click OK to confirm that you're aware this is an executable file.
Read through the Google Calendar Sync Terms of Service, and click I Agree.
Follow through the Installation Options and click Install to finish the set-up process.
Once Google Calendar Sync is installed on your computer, the Google Calendar Sync Settings window will appear:

In the Settings window, enter your full Google email address (ending in and password and select the Sync Option you prefer.

You'll also be able to set the time interval for syncing to occur. Please keep in mind that 10 minutes is the minimum time interval allowed.

After the initial set-up, you can access the Google Calendar Sync Settings window again by double-clicking the calendar icon in your Windows System Tray.


Launch Outlook and click the "Calendar" module in the top toolbar of the window.
Select the desired calendar in the left frame, if applicable, and select "Save As" under "File" in the top menu bar.
Type the file name and select "iCalendar Format (*.ics)" from the drop down menu next to "Save as type".
Click the "More Options" button and select "Specify dates" from the drop down menu next to "Date Range".
Type the starting and ending dates for the calendar in the corresponding fields and then click the "OK" button.
Click the "Save" button.

Read more: How to Convert an Outlook Calendar to ICS |

How to Install in Thunderbird
Download and save the file to your hard disk.
In Mozilla Thunderbird, open Add-ons from the Tools menu.
Click the Install button, and locate/select the file you downloaded and click "OK".

Which is right for me?

You may prefer Lightning if...
you send or receive meeting invitations via email
you already use Mozilla Thunderbird for email
you customize your applications with add-ons (such as extensions or themes)
You may prefer Sunbird if...
you prefer your calendar to be separate from your email client
you don't currently use Mozilla Thunderbird for your email
you don't like adding add-ons (such as extensions or themes) to your applications

Outlook does not store its calendar data in an open standard format, so Calendar and Sunbird currently do not support Outlook directly. However, you may be able to export your Outlook events as an .ics or .csv file, and import them into Sunbird or Lightning using the "Calendar Files" or "Outlook Comma Separated" file type, respectively.

The Mozilla Calendar Project is a community driven project based on the Mozilla application architecture. The Project's heart is a calendaring backend based on libical. The Lightning extension is built on top of this platform and provides integrated calendaring capabilities for Mozilla Messaging's Email client Thunderbird.

Mozilla Calendar emphasizes free and open source technology and supports standardized technology like the ical/ics (rfc2445) format and the CalDAV (rfc4791) protocol, which is implemented by many freely available servers and also some commercial providers.

Mozilla Sunbird, Portable Edition
What is SOGo?

SOGo is groupware server with a focus on scalability and open standards.

SOGo provides a rich AJAX-based Web interface and supports multiple native clients through the use of standard protocols such as CalDAV, CardDAV and GroupDAV.

DAViCal is a server for calendar sharing. It is an implementation of the CalDAV protocol which is designed for storing calendaring resources (in iCalendar format) on a remote shared server.
is Free Software licensed under the General Public License.
uses an SQL database for storage of event data
To install and use DAViCal you will need:
a PostgreSQL database server
a web server which can run PHP version 5

CSV to iCal Calendar Convertor

From Yahoo / Outlook to iPod, iPhone, iCal and Google Calendar.

he Chandler Server download contains all of the components you will need to run the server out of the box, including the Tomcat servlet engine and Derby database server.

This extension allows Sunbird and Lightning to read and write events to a Google Calendar.

Please read for more details and before filing a bug. Also, be sure to visit the dicussion forums, maybe your bug already has a solution!

Please use to submit bugs.

Product: Calendar
Component: Provider: GData

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