Patch 3.1 April 14 or April 21?

As a lot of you may know, patch 3.1 will most likely be coming out April 14 or April 21st, but what everyone is wanting to know is, what day will it be? It seems like blizzard is really wanting to get this patch out, they have already canceled the gear manager due to glitches in the next patch. Blizz has also been saying that arena season 5 will be ending april 14th and that it will be a few weeks before arena season 6 starts, this could tell us that the patch is coming out April 21st or possibly later? At this point who knows when the patch will come out, my guess is if the PTR shuts down Monday night there is a high probability that the patch will be released on tuesday. I guess we will just have to wait and see.