Nightly Lightning builds are now available for development and testing

• There are KNOWN BUGS in the calendaring code, some might cause DATALOSS.
  • Don't trust these builds with important calendaring or mail data
  • Always make backups (one possible strategy for Calendaring data backups is described at Calendar:WebDAV testing harness).

• Please report bugs at http://bugzilla.mozilla.org/

Compatibility

In case you are not sure which version to download, please check the Calendar Versions page.