Does anyone know if I change from an extension to visit family to a 90 day Non O based on marriage when should the new stamp start? My current visa expires on May 5 but immigration told me that I need to apply for the Non O before the 22nd of April. I'm just wondering if I am going to lose days on my current stamp when I make the switch. They also told me I could come today to make the Non O. I didn't think to ask Immigration yesterday and it's a 1 hour drive :(