Switch/3DS/Wii U/Mobile - maintenance schedule for June 23-27, 2017

Services impacted
Nintendo Switch: online play, leaderboards (unspecified games)

Times
Europe: June 23rd (2.50AM to 4.30AM)
UK: June 23rd (1.50AM to 3.30AM)
North America (EST): June 22nd (8.50PM to 10.30PM)
North America (PST): June 22nd (5.50PM to 7.30PM)
Japan: June 23rd (9.50AM to 11.30AM)

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Services impacted
Android: Fire Emblem Heroes
iOS: Fire Emblem Heroes

Times
Europe: June 27th (1AM to 3AM)
UK: June 27th (12AM to 2AM)
North America (EST): June 26th (7PM to 9PM)
North America (PST): June 26th (4PM to 6PM)
Japan: June 27th (8AM to 10AM)

***

Services impacted
Nintendo Switch: online play, leaderboards (unspecified games)
Wii U: online play, leaderboards (unspecified games)
Nintendo 3DS: online play, leaderboards (unspecified games)

Times
Europe: June 27th (2AM to 5AM)
UK: June 27th (1AM to 4AM)
North America (EST): June 26th (8PM to 11PM)
North America (PST): June 26th (5PM to 8PM)
Japan: June 27th (9AM to 12PM)

***

Services impacted
Wii U: Super Mario Maker (Super Mario Maker Bookmark)
Web: Super Mario Maker (Super Mario Maker Bookmark)

Times
Europe: June 27th (7AM to 8.30AM)
UK: June 27th (6AM to 7.30AM)
North America (EST): June 27th (1AM to 2.30AM)
North America (PST): June 26th (10PM to 11.30PM)
Japan: June 27th (2PM to 3.30PM)

from GoNintendo