Vostok Island is an uninhabited coral island in the central Pacific Ocean, part of the Line Islands belonging to Kiribati. Other names for the island include Anne Island, Bostock Island, Leavitts Island, Reaper Island, Wostock Island or Wostok Island. The island was first sighted in 1820 by the Russian explorer Fabian Gottlieb von Bellingshausen, who named the island for his ship Vostok.
The Line Islands, Teraina Islands or Equatorial Islands (Gilbertese: Aono Raina) are a chain of 11 atolls (with partly or fully enclosed lagoons, except Vostok and Jarvis) and coral islands (with a surrounding reef) in the central Pacific Ocean, south of the Hawaiian Islands. Eight of the atolls are parts of Kiribati. The remaining three—Jarvis Island, Kingman Reef, and Palmyra Atoll—are territories of the United States grouped with the United States Minor Outlying Islands. The Line Islands, all of which were formed by volcanic activity, are one of the longest island chains in the world, stretching 2,350 km (1,460 mi) from northwest to southeast. One of them, Starbuck Island, is near the geographic center of the Pacific Ocean (4°58′S 158°45′W / 4.97°S 158.75°W). Another, Kiritimati, has the largest land area of any atoll in the world. Only Kiritimati, Tabuaeran, and Teraina have a permanent population. Besides the 11 confirmed atolls and islands, Filippo Reef is shown on some maps, but its existence is doubted.
The International Date Line passes through the Line Islands. The ones that are parts of Kiribati are in the world's farthest forward time zone, UTC+14:00. The time of day in these atolls is 24 hours ahead of the state of Hawaii in the United States, which uses UTC−10:00, and 26 hours ahead of some other islands in Oceania, such as Baker Island, which uses UTC−12:00.