https://thenextweb.com/gaming/2018/09/12/heres-your-reminder-of-what-the-nascent-switch-online-service-will-get-you/

Nintendo today announced it would finally be debuting the Online service for the Switch. The service, which was announced shortly after the Switch itself, will go live on September 18.

— Nintendo of America (@NintendoAmerica) September 12, 2018