Wyrdness on 18 December 2018
NPD has Switch as the top seller by the month was very close.
https://nintendoeverything.com/november-2018-npd-switch-outsells-ps4-and-xbox-one-moves-over-1-3-million-units/?fbclid=IwAR26_z782ZC6JoNRPLziOvjX_O2-eV50JCo41mIORCA6uQYk5mcZCv5NG1Q