banwaves are never announced so no one can put a date on one happening, the last major ban wave was on the people who played halo 4 early and before that was around the time of MW2!!
(Update) Next ban-wave happens 12-24-12 and what was your GT anyway lol If they told ya you wouldn't screw around at that date. Or would you?
Play big games early like a month early like HALO 4 and you will get banned haha but then a ban wave is never announced it just happens
but seriously if they announced it it wouldn't really be a ban-wave. It would be more of a here's your sign wave cuz know one would be on.