I have recently learned from a family friend that if a Canadian citizen is here for 6 months on visa-free terms, after the 6 months are up, they can go back to Canada and stay for one day, then come back to the US for 6 months.
I already knew about staying visa free for 6 months, but I'm not convinced about the 1-day in home country to reset the 6 months. Does anyone know where I can get more information on the matter to verify that?
edit: That I am a US Citizen, but my girlfriend lives in Canada.