Originally Posted by alanh

Yes, May 14th is the 6 month time limit. For safety's sake give it an extra day or two, in case they argue that you can't cancel until after May 14.

Note that even if you cancel Netflix, you won't be able to use it as a partner if there's a 2012 Grand Slam. They keep a record of your DM number and won't award a second bonus to it.