XFINITY Home touchscreen with home Wi-Fi

I have the Xfinity home security touch screen from my service which is currently canceled - they left me the touch screen and the Netgear wireless router.   The unit still chimes for door/window alerts.  But it also double beeps every 10 - 15 minutes due to lack of Xfinity service connectivity ?

Two questions -

Can I stop this annoyning beep ?

Can I use my local WIFI for the time and weather (as both are wrong/blanked out since service stopped)?   I selected my home wifi network and it says connected successfully, but the time/date are still off