I studied in the US for a year under a J1 visa that is subject to the 2-year home country presence requirement. I returned to Canada on July 4th. Since then I have taken multiple short trips to the USA (at least once a month, usually for a few days) to visit my boyfriend in the USA. How is the 2 year requirement computed? Is it a total of 730 days? How are the days in the US counted? i.e. if I fly out to the US on an evening flight and land in the US the same day, does it count as a day in my home country in order to fulfill the requirement?