Chinese name: Sri Lanka democratic socialism and Chinese English name. : Democratic Socialist Republic of Sri Lanka. Short for Sri Lanka. Mainland: Asia. Capital: Colombo. National Day: February 4th (1948). National anthem: bow, bow, mother. Official languages: Sinhala, Tamil. Currency: Sri Lankan rupee time zone. : Eastern District 6. State leaders: President mahinda rajapaksa, Prime Minister Jayaratna. Population: 20.2 million (2009). Main ethnic groups: Sinhalese, Tamils and Moors. Main religions: Buddhism, Hinduism and Christianity. Land area: 656 10 km2. International telephone area code: +0094 Road traffic: Keep left. National flower: lotus. National tree: Bodhi tree. National stone: opal. National bird: Hei Weiyuan. national flag