3DS maintenance taking place on Sunday night

The 3DS network will be undergoing maintenance on this coming Sunday. Some network services for the 3DS may become unavailable.

The maintenance period is scheduled as such:

• 7 PM PT – 8 PM PT
• 10 PM ET – 11 PM ET
• 3 AM in the UK – 4 AM in the UK
• 4 AM in Europe – 5 AM in Europe

Source