I'm wondering whether the days of arrival and departure to the island are counted as part of the 90 day stay? The reason I'm asking is that if you arrive on a Saturday and then leave 13 weeks later on a Saturday, the count of full vacation days is 90 but your arrival and departure days is a partial of 2. Would this the be ok without requiring an extension visa or not? This technicality could potentially save or add $500 US with the cab rides. Thanks in advance for all opinions.