The Mozilla Calendar project has released version 0.3 of Sunbird, a Gecko-based calendar application; and Lightning, a similarly capable extension for Thunderbird.

According to the release notes, these versions feature:

Basic handling of events received in email allows you to easily add iMIP events to your calendar.

• Reloading network calendars is now possible.
• Agenda view rolls over to the next day at midnight.
• 24-hour views show you your entire day, not just a few hours.
• Reliable alarms ensure you are notified about events or tasks.
• Improved localization support
• Vastly improved reliability makes it much more difficult to lose data.
• Many performance improvements