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Try one of these articles:

  • Integration into Thunderbird Starting with Thunderbird 38, Lightning has been packaged with Thunderbird. Learn more about setting up calendars for events and tasks in Thunderbird.
  • Inviting Other People to Events If you need to set up a meeting, and keep track of who's attending and who is not, Lightning can do this as well as allow you to send invitations to people who do not have Thunderbird/Lightning, including Microsoft Outlook users!
  • Configuring Lightning This article describes how to configure the Lightning add-on for Thunderbird.
  • Adding a holiday calendar This article describes how to add a holiday calendar to the latest version of Lightning (a popular calendaring add-on for Thunderbird).
  • Creating New Calendars Using Thunderbird it's possible to have multiple calendars. You can create these in Calendar Mode or in Task Mode.
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