The next public mass test will happen on our test server Singularity on Thursday at 19:00 UTC (= EVE-time).  We are testing the client and server performance of the Retribution 1.1 release.

The testing should last around 60 minutes. All participants will receive two million skill points on Singularity.

Please refer to this thread for more information about how you participate in the test, and this EVElopedia article for more information on mass testing.