All of Nintendo’s digital shops are undergoing maintenance on Monday

This coming Monday, Nintendo’s digital shops will be undergoing maintenance for a few hours. This will affect the Wii U and 3DS eShops, Wii Shop Channel, and DSi Shop. The maintenance will be taking place between 4 PM ET and 8 PM ET (1 PM PT and 5 PM PT).

As noted on Nintendo’s official network page:

From Monday, September 15, 2014 1:00 PM
– Monday, September 15, 2014 5:00 PM Pacific Time
Affected Services:
Wii U
– Nintendo eShop
Nintendo 3DS
– Nintendo eShop
Wii
– Wii Shopping Channel
Nintendo DS
– Nintendo DSi Shop

Source