Sunbird and Lightning Calendars
From MozillaZine Knowledge Base
Lightning is an add-on extending Thunderbird or Seamonkey to integrate standards-based calendaring. Lightning provides for managing calendar data, subscribing to iCalendar feeds (RFC5545), interacting with calendaring services, chiefly CalDAV (RFC4791), and receiving and sending iTIP/iMIP email invitations (RFC5546/RFC2447).
Sunbird was a standalone, standards-based calendaring application for managing calendar data, subscribing to iCalendar feeds (RFC5545), and interacting with calendaring services, chiefly CalDAV, built with many of the same components as Lightning (and without email integration). It is no longer supported or developed - The Calendar Project has stopped Sunbird development to focus on Lightning, so Lightning is currently a safer choice for new users. And time zone information is no longer updated.
Lightning and Sunbird are based on a rewrite of Calendar Extension, which is no longer in active development. Development was originally started at OEOne corporation (Canada, now named Axentra), and later for periods a few developers were supported by Oracle (US), Sun Microsystems (Germany, later aquired by Oracle), and by Mozilla Messaging, as well as by volunteers and donations from around the world.
To follow the progress of Lightning and Sunbird, see the Calendar Weblog.
You can discuss Lightning and Sunbird in mozillaZine's Calendar forum.
Lightning is also discussed in the
For Testers and Developers
Nightly builds for testing are available. For nightly Lightning builds, see its download page.
Developers interested in the project can follow progress and contribute to the
Or chat at:
Results of testing capatibility with various CalDAV servers are recorded at
To compile from sources, see Sunbird and Lightning build instructions.