Earlier this week we took a look at how awesome Thunderbird’s Lightning Calendar add-on is. The one problem with it, however, is that by default it is only includes a locally stored calendar. If you use Google Calendar across your devices, Lightning syncs up with it flawlessly. The setup isn’t very intuitive though, so here’s a groovy guide to setting it up to work correctly.
Sync Thunderbird with Google Calendar
Open up your Google Calendar with your favorite browser, and open the Settings menu by clicking the gear icon at the top-right of the page.
Click the Calendars tab, and then click on the Calendar that you want to use for syncing.
Scroll down the calendar’s settings page and find the exact calendar ID. If this is your default calendar the ID will likely be your Gmail address.
Now, open up Thunderbird and click File >> New >> Calendar.
Now there are two bullet choices in the pop-up that appears. Click “On the Network” and then Next.
For the format, select CalDAV and then type in the following URL except substituting your own calendar ID for “YOURCALENDARID”
After you’re done typing, click Next.
Type in a name for your calendar and select an icon color for it. You can also set up which email account you would like the calendar to use for invitations and other correspondence. Click Next.
Enter the Google credentials tied in with the account the Google Calendar belongs to.
Click Finish, and you’re done.
Now your Google Calendar is synced to Mozilla Thunderbird with the Lightning Calendar addon.