Bulgaria is situated closer to the Equator than the pole. It falls within the southern part of the temperate climate zone with subtropical influence. Its location on the transition line between two climate zones influences the climate, soils, vegetation and animal species. All of them are characterized by great diversity. The country's geographic position also determines the relatively wide angle of sunlight that falls on the country, making the country predominantly sunny. The official time in Bulgaria is Eastern European Time, which is two hours ahead of Greenwich Time. The Black and the Aegean Sea also influence the country's climate. The influence of the Mediterranean is extensive for the climate in the southern parts of the country, while the Black Sea influences the climate over an area extending some 40 km inland, supporting diverse flora and fauna. The Danube River is important for the country, both with regard to water resources and for species diversity. Bulgaria's favorable geographic location creates excellent preconditions for the development of tourism.