RTC widget and connection loss

Hello, i wonder what happens with RTC when arduino lose connection with server(internet down). Does it freeze at last known time? Or it continues with help of internal timer1 and syncs after reconnect?

If you turn off your router, wait 10s and turn it back on you will have your answer.

RTC uses the time on the server and you can set the sync interval from every second upwards.

I wouldn’t ask this question, if I am able to use debug serial and print time there. But I dont have usb-ttl adapter and I am using hardware serial on mega328p for esp8266, so I need to know from someone who tried it.

In that case: