With Thunderbird, it's possible to have multiple calendars. During email account setup, your existing online calendars can be automatically detected. Or you can set up new calendars in Calendar Mode or Task Mode.

Connect to your online calendars during email account setup

After setting up your existing email address with convenient auto-configuration, Thunderbird will now automatically detect your remote address books and calendars based on the user information you provided.

When adding a Google mail account to Thunderbird, you can easily add your existing Google calendars and address book (see Notes).

Creating a new calendar

From the Calendar Tab (not the sidebar):

• Right-clickHold down the Control key while you click in the calendar list on the left side of the screen.
• Choose New Calendar… from the context menu.
• Alternatively, you can use ≡ > New > Calendar…, or File > New > Calendar….

Now you need to choose whether you want to create the calendar "on your computer" or "on the network".

On your computer - local calendars

When choosing "On my computer", you can only use the calendar on the computer you're working at. All the data is stored inside an internal database (the file local.sqlite in your Thunderbird profile).

• Choose On my computer and click NextContinue.
• Enter a name for your calendar and choose a color, then click Create Calendar.

On the Network - connect to your online calendars

When choosing "On the Network", your calendar files may reside on general webservers (read-only), on WebDAV or CalDAV servers, on the local filesystem or a network share, or you could use your Google calendars.

• Choose On the Network and click NextContinue.

1. Enter your username, for example your email address on Gmail.
2. Enter the calendar URL in the Location field. Thunderbird recognizes a variety of calendar URLs.
3. If applicable, check This location doesn't require credentials.
4. Offline Support is checked by default, so that you can also use your calendar when you are offline.
5. Click on Find Calendars.

In the next step, Thunderbird will show you a selection of available calendars.

• You can change the properties of each calendar, for example its name and color, using the Properties button.
• Check the calendars you want, and click on Subscribe.

Finding the link to your Google calendar

1. Go to your Google calendar on the browser, click the Options menu (3 points) next to the name of the calendar you wish to subscribe to and click on Settings and sharing.

1. Find and copy a link to your calendar.
   • In the Access permissions for events section, click on Get shareable link and copy the link.
   • Alternatively, you can use ICS format: In the Integrate calendar section, select and copy the link under Public address in iCal format or Secret address in iCal format.
2. Paste this link into the Location field of the Create New Calendar dialog box.

iCalendar (ICS)

You're able to subscribe to calendars provided by third parties, mostly in ics format. These are almost always read-only; you won't be able to change anything for the calendars. An example of this kind of calendar are the holiday calendars provided by Thunderbird.