Calendar integration into Thunderbird

Starting with Thunderbird 38, the calendaring extension Lightning has been packaged with Thunderbird. This is a big advantage for previous Lightning users, because a compatible version of Lightning is always available with Thunderbird. It is also a great opportunity for Thunderbird users that haven't been using Lightning, as it becomes easier to process emails that contain invitations.

Maintain your schedule locally using the precreated "Home" calendar, or synchronize with a remote calendar using iCalendar files on a WebDAV server or a calendaring server supporting the CalDAV protocol. There are also extensions available for enhanced Google Calendar support and Microsoft Exchange among others. You can find them on addons.mozilla.org. An article on creating new calendars is available for more information.

For more information, you can read more on using Lightning or visit the calendar overview page for more support topics.

This integration of course does not mean that you must use Lightning. You are free to disable it at any time, but for the sake of making it easier to identify issues in the future, it is recommended to leave it enabled and hide the features you do not use. There should not be a notable performance impact, especially when you have not added any events. You can hide the "Today Pane" by clicking the button in the status bar at the bottom of the screen.

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