Quoted from: http://www.mozilla.org/projects/calendar/sunbird.html


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The Sunbird Project is a redesign of the Calendar component. Our goal is to produce a cross platform standalone calendar application based on Mozilla's XUL user interface language.

Calendar vs. Sunbird

Calendar is the calendar extension for Mozilla products such as Mozilla Firefox,Mozilla Thunderbird, Seamonkey and the Mozilla Application Suite.

Sunbird is the standalone form of the calendar extension, which means that it doesn't need one of the above mentioned applications to run. Sunbird and Calendar use the same base code so their functionality is virtually the same and they share the same bugs and bug fixes. Some features currently depend on the underlying product:

• Open URL works only on Mozilla Firefox., Seamonkey and the Mozilla Application Suite.
• Email alarm works only in Mozilla Thunderbird, Seamonkey and the Mozilla Application Suite.

We would like to emphasize the fact that Sunbird 0.3 alpha1 is not intended to be a production-quality release. It is pre-release software and should be treated as such. This means that this release may contain serious bugs leading to application crashes, dataloss or other unforeseen consequences.

The Sunbird/Calendar development team keeps a development weblog. It is intended for everyone who is looking for in-depth, up-to-date information about current events in Sunbird/Calendar development.

Limitations and Known Bugs

Before using Sunbird 0.3 alpha1, it is strongly encouraged that you read the following limitations that the release possesses. The goal was to provide a similar set of abilities that Sunbird 0.2 provided, but based on the new backend code.

• Sunbird 0.3 alpha1 will not automatically migrate your old calendar files from Sunbird 0.2. You will have to manually import them from your profile folder or resubscribe to your remote calendar files.
• Windows versions of Sunbird 0.3 alpha1 will crash for dates after 2037 and before 1970. (bug 278236)
• Drag and drop support is severely limited from 0.2 abilities
• Switching from Task to Event in the Event dialog fails
• Attachments cannot be added to events (bug 168680)
• Printing support is very limited
• 'Tasks in view' options does not work. (bug 308831
• Alarms can only be snoozed for 5 minutes
• Alarms missed while Sunbird was closed will not be fired
• Email alarms do not work in Sunbird
• Publishing errors will be reported poorly
• The timezone preference does nothing
• Unchecking a calendar may cause a Javascript error