Out of the blue, Nintendo has scheduled maintenance for this evening for its network infrastructure. At the time of this writing, the maintenance is currently underway. It is affecting all Nintendo systems (Switch, Wii U and 3DS). As a result, certain network services are currently unavailable while the work is being carried out.
- NOVEMBER 29th, 2017: 5PM to 6 PM (Pacific)/ 8PM to 9PM (Eastern)
3DS and Wii U already had some maintenance earlier this week. The Switch will be undergoing several hours of network maintenance tomorrow, leading into early Friday morning, If you plan on hopping into some online multiplayer matches, then keep the timetable in mind.