Peak tourist season along the Dalmatian Coast is July and August, when it can get hot, crowded, and expensive. Try the shoulder seasons for a bit of breathing room. There are seven international airports; Split, Zadar, and Dubrovnik are popular ports of entry. Croatia is part of the European Union, so E.U. visa regulations apply. The official language is Croatian, but English and German are commonly understood. The local currency is the kuna; euros are accepted in hotels and tourist apartments. ATMs are available in bigger destinations, but may not be as common on smaller islands. Transportation is by bus or ferry service; alternatively, rent scooters or a car. Standard tipping is 10 percent. Electricity is 220 volts.