How to Sync a Google Calendar to Thunderbird

by Jason Spidle

Mozilla Thunderbird is an open source email client that competes with Microsoft Outlook. The client includes all the features you would expect from a full-featured productivity suite, including a calendar application with support for syncing to online calendars like Google Calendar. Utilizing the Lightning extension for Mozilla Thunderbird, users can easily enable two-way sync between Thunderbird and Google Calendar. The sync utilizes Google Calendar's CalDAV protocol to keep appointments up-to-date between the desktop client and the online interface.

Install Lightning Extension

Launch Thunderbird.

Select "Tools," then "Add-ons."

Click "Get Add-ons."

Search for "Lightning."

Click "Add to Thunderbird" to install the extension and then restart Thunderbird.

Sync Google Calendar to Thunderbird

Launch Thunderbird.

Select "File," and "New," then "Calendar."

Select "On the Network" and click "Next."

Select "CalDAV."

Enter your Google Calendar CalDAV address in the location field and then click "Next." The Google Calendar CalDAV address for your default calendar uses the following naming convention:[ your Google Calendar user name ]/events

Personalize the name and color of your calendar and then click "Next."

Click "Finish" to complete the sync process.


  • check To determine the CalDAV address of non-default Google Calendars, click on "Settings" from the Google Calendar interface and then select the "Calendars" tab. Click the calendar for which you need the CalDAV address and the ID will be listed in the "Calendar Address" section.

Items you will need

About the Author

Jason Spidle is a technology enthusiast and writer. His writing on computers, smartphones, Web design, Internet applications, sports and music has been published at a variety of websites including Salon, JunkMedia, Killed in Cars and The Columbia Free Times. Spidle maintains a number of blogs featuring poetry, short stories and other fiction.

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Photo Credits

  • photo_camera calendar image by Christopher Hall from