Mario Kart 8 Deluxe maintenance taking place tonight

Nintendo will be starting a maintenance process for Mario Kart 8 Deluxe on Switch that will affect all online play, so all network services related to this game will be unavailable during these hours tonight:

• 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