Can someone explain to me how the visa duration is calculated? I just arrived, I have a 90 day visa, starting from 30-July. My passport stamp says it should end on the 27th October, but wolfram alpha and my flight out 😰 say the 28th October. I can (costly) change my flight out, or beg for a 7 day extension, but I’d rather know if it’s my mistake before I spend the money.