Hello Markhaynie89

                                   We understand that you looking for an option to turn off Wi-Fi or the modem at certain time but, there is no such option available on the modem interface/GUI SBG8300

or even on the surfboard central app. So you have to do it manually by turning off the modem when that is needed.

I recommend using smart plug and set timer.  I used it for my Christmas lights and works like a charm.