Projects / Lightning


Lightning is a calendar application which works with the popular Mozilla Thunderbird and SeaMonkey mail clients. It lets you manage multiple calendars, create your daily todo list, invite friends to events, and subscribe to public calendars.

Operating Systems

Recent releases

  •  11 Jun 2014 09:13

    Release Notes: This version features bugfixes in CalDAV and webdav-sync.

    •  16 Dec 2013 08:45

      Release Notes: This release is compatible with Thunderbird 24.2.0. It fixes an issue with CalDAV which affected version 2.6.3 with some CalDAV servers. Chunked webdav-sync is now handled correctly.

      •  26 Nov 2013 09:34

        Release Notes: This release fixed a bug that broke CalDAV scheduling, fixed webdav-sync, and was updated to work with Thunderbird 24.1.1 and later.

        •  04 Nov 2013 09:32

          Release Notes: This release has been updated to work with SeaMonkey 2.21 and later, and Thunderbird 24.1.0 and later. Users of Thunderbird 24.0.1 should continue to use Lightning 2.6.1, and users of Thunderbird 24.0 should continue to use Lightning 2.6.

          •  22 Oct 2013 15:54

            Release Notes: On Windows, the binary component is now signed. This avoids issues with some virus scanners. This release can make a recurring event finite without opening the custom recurrence dialog. It can create a monthly recurring event on the last day of the month. Events can have multiple categories. Updated to the latest timezone information 2013d. It's now more obvious what to do when no calendars support email invitations. Support for Google Calendar via CalDAV. Mac and Linux now support overlay scrollbars. Some view related performance fixes.


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