Nintendo just announced that the Nintendo NX will be out in March 2017. That release window is global.
Via a financial release, Nintendo states, "For our dedicated video game platform business, Nintendo is currently developing a gaming platform codenamed 'NX' with a brand-new concept. NX will be launched in March 2017 globally."
In a tweet, the company pointed out that "NX" is still only the console's codename.
Oddly, Nintendo apparently will not be showing the still unrevealed NX platform at this year's E3, according to Wall Street Journal reporter Takashi Mochizuki, who was at today's Nintendo financial briefing in Osaka.
1. No NX at E3. Will focus on new Zelda
— Takashi Mochizuki (@mochi_wsj) April 27, 2016