Quick tutorial on how to setup Thunderbird to use Google Calendar. With the Provider for Google Calendar addon, you're able to synchronize your calendar events and tasks both ways. So if you make an event in Thunderbird, it will show on Google Calendar and vise versa.
Relevant Articles
https://support.mozilla.org/en-US/kb/using-lightning-google-calendar
https://addons.mozilla.org/en-US/thunderbird/addon/4631/
