The aim of this page is to give an overview over the latest calendar features. Thus, we hope you'll find the following feature comparism helpful!
| Lightning | Sunbird | |
|---|---|---|
| Development status | Actively maintained | Deprecated |
| Supported platforms What operating systems are supported? |
Windows, Linux, Mac OS X with Mozilla Thunderbird (see System Requirements) | Windows, Linux, Mac OS X (see System Requirements) |
| Supported calendar formats What calendar formats do Lightning / Sunbird support? |
iCalendar (ICS), CalDav, Sun Java System Calendar Server (WCAP), Google Calendar (via this add-on) | iCalendar (ICS) and Comma Separated Values (CSV) for Outlook |
| Always up to date Will I regularly get updates? |
![]() |
![]() |
| Seamlessly integrated into Thunderbird Can I manage my schedule within my favorite e-mail client? |
![]() |
![]() |
| Standalone program Can I use it as a standalone program so that I don't need other applications? |
![]() |
![]() |




