And... some more. (Yay, new page).
Nintendo Switch: online play (unspecified games)
The downtime will take place on the following day(s) and at the following time:
Europe: August 3rd (9.50AM to 11.30AM)
UK: August 3rd (8.50AM to 10.30AM)
North America (EST): August 3rd (3.50AM to 5.30AM)
North America (PST): August 3rd (12.50AM to 2.30AM)
Japan: August 3rd (4.50PM to 6.30PM)