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Mozilla Sunbird®

Sunbird 1.0 beta1

Mozilla Sunbird® is a cross-platform calendar application, built upon Mozilla Toolkit. Our goal is to provide you with a full-featured and easy to use calendar application that you can use around the world.

This is the last public Sunbird release by the Calendar Project.
We recommend upgrading to Thunderbird and Lightning.

Support the Sunbird Team

Please support our efforts by donating to the Calendar Project.


Sunbird is licensed under a MPL/GPL/LGPL triple license, allowing use of the files under the terms of any one of the Mozilla Public License, the GNU General Public License, or the GNU Lesser General Public License.

You can find builds for the different platforms on our download page.
Localized builds are also available.