IX. Business Travel Business Hours Government, banking and industry hours are Monday and Tuesday 8:00 am to 12:30 pm and 2:30 pm to 6:30 pm and Wednesday to Friday 8:00 am to 12:30 pm and 2:30 pm to 6:00 pm. Commerce hours are Monday to Friday 8:00 am to 12:30 pm and 3:00 pm to 7:00 pm and Saturday 9:00 am to 1:00 pm. Travel Advisory and Notes U.S. citizens must have visas and inoculations against yellow fever. Typhoid, tetanus and gamma globulin immunizations are strongly recommended. Capeverdean escudos are not convertible outside the country. Holidays January 1, New Year's Day January 20, National Heroes' Day Ash Wednesday Good Friday May 1, Labor Day July 5, Independence Day August 15, Assumption Day November 1, All Saints December 25, Christmas Business Infrastructure Regular direct flights connect Sal island with New York, Washington, Lisbon, Amsterdam, Rio de Janeiro. Direct flights link Praia with Dakar, Bissau and Banjul. Scheduled domestic air service connects Sal, Praia and Mindelo with most of the other islands. International shipping companies make regular stops at Mindelo and Praia. Small vessels operate inter-island services. Cape Verde can be direct-dialed. International access code: 011. Country code: 238. Cape Verde is 4 hours ahead of EST in winter and 3 hours ahead in summer.