The word “Sundarban” is derived from sundari and ban, which, when combined, means “the forests of sundari”- an obvious reference to the large mangrove trees. The 1330 sq km area of Sundarbans was established as a National Park on May 4, 1984. The Sunderbans had earlier been designated as a Tiger Reserve in December 1973. After this, a wildlife sanctuary was created in 1977.