My traveling companion has a Schengen visa valid from June 29 to August 9 but it states duration of stay for 27 days. We arrive in Amsterdam on June 29 & depart July 26. Does the duration start from the day of arrival? If so, our departure date of July 26 makes the stay 28 days - will this be a problem when we leave Amsterdam? Should we raise this issue upon our arrival in Amsterdam to the immigration authorities? As our air tickets are fixed (no changes are allowed) - leaving earlier is not really an option. Any advice is appreciated!