Lightning Calendar
Organize your life — it’s about time!
Organize your schedule and life’s important events in a calendar that’s fully integrated with your Thunderbird or Seamonkey email. Manage multiple calendars, create your daily to do list, invite friends to events, and subscribe to public calendars.
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Compatibility Information Thunderbird, Seamonkey, what version? -
Get Support Need help with Lightning? -
Holiday Calendars Need a break? Now you know when! -
Developer Tools Dive into development. -
Bugzilla Found a bug? Let us know! -
Bugs Ahoy! Want to make a difference? Fix a bug that fits your interests.