... In an updated statement released on Wednesday, Nintendo has fine-tuned the timetable. Within Japan, 3DS and Wii U online service is scheduled to conclude on April 9 at 9 a.m., and the shutdown will occur simultaneously, at 4 p.m. on April 8, within North America.
The silver, or at least silvery, lining is that the 3DS’s StreetPass functionality will continue even after April 8/9, due to operating via local connection between 3DS units themselves. All other forms of online multiplayer play, though, including SpotPass, are going away.