The next public mass test will happen on our test server Singularity on Wednesday at 18:00 UTC (= EVE-time).  We are testing a fix to a bug found in the last mass test, which caused the space to turn grey during large fleet fights.

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.