What we do know however is EU fan fest will be mid Feb and 3.55 will come after EU fan fest. So you are looking at Feb 21 or 28 and my guess is Feb 28. Keep in mind SE needs to drag out the content as much as possible since they don't really have much plan until 4.0 stormblood. 3.55 will introduce more MSQ and rework diadem and 24 ultima, thats it. 3 more content.