Kiritimati (Gilbertese pronunciation: [kiˈrɪsmæs]), also known as Christmas Island, is a Pacific Ocean atoll in the northern Line Islands. It is part of the Republic of Kiribati. The name is derived from the English word "Christmas" written in Gilbertese according to its phonology, in which the combination ti is pronounced /s/.
Kiritimati is one of the world's largest atolls in terms of land area, consisting of about 312.38 km2 (120.61 sq mi) land area and a 328 km2 (127 sq mi) network of lagoons. The atoll is about 150 km (93 mi) in perimeter, while the lagoon shoreline extends for over 48 km (30 mi). Kiritimati comprises over 70% of the total land area of Kiribati, a country encompassing 33 Pacific atolls and islands.
It lies 232 km (144 mi) north of the equator, 2,160 km (1,340 mi) south of Honolulu, and 5,360 km (3,330 mi) from San Francisco. Kiritimati is in the world's furthest forward time zone, UTC+14, and is therefore one of the first inhabited places on Earth to experience New Year's Day (see also Caroline Atoll, Kiribati). Although it lies 2,460 km (1,530 mi) east of the 180th meridian, the Republic of Kiribati realigned the International Date Line in 1995, placing Kiritimati to the west of the dateline.
Nuclear tests were conducted on and around Kiritimati by the United Kingdom in the late 1950s, and by the United States in 1962. During these tests, the island was not evacuated, exposing the Kiribati residents and the British, New Zealand, and Fijian servicemen to nuclear radiation.
The entire island is a wildlife sanctuary; access to five particularly sensitive areas is restricted.
Kiritimati was initially inhabited by Polynesian people. Radiometric dating from sites on the island place the period of human use between 1250 and 1450 AD. Permanent human settlement on Kiritimati likely didn't occur until 1882. Stratigraphic layers excavated in fire pits show alternating bands of charcoal indicating heavy use and local soil indicating a lack of use. As such, some researchers have suggested that Kiritimati was used intermittently (likely by people from Tabuaeran to the north) as a place to gather resources such as birds and turtles in a similar fashion to the ethnographically documented use of the five central atolls of the Caroline Islands.
Archaeological sites on the island are concentrated along the east (windward) side of the island and known sites represent a series of habitation sites, marae, and supporting structures such as canoe storage sheds and navigational aids.
The atoll was then discovered by Europeans with the Spanish expedition of Hernando de Grijalva in 1537, that charted it as Acea. This discovery was referred by a contemporary, the Portuguese António Galvão, governor of Ternate, in his book Tratado dos Descubrimientos of 1563. During his third voyage, Captain James Cook visited the island on Christmas Eve (24 December) 1777 and the island was put on a map in 1781 as île des Tortues (Turtles Island) by Tobias Conrad Lotter in Augsburg. Whaling vessels visited the island from at least 1822. and it was claimed by the United States under the Guano Islands Act of 1856, though little actual mining of guano took place.
Permanent settlement started in 1882, mainly by workers in coconut plantations and fishermen. In 1902, the British Government granted a 99-year lease on the island to Levers Pacific Plantations. The company planted 72,863 coconut palms on the island and introduced silver-lipped pearl oysters into the lagoon. The settlement did not endure: Extreme drought killed 75% of the coconut palms, and the island was abandoned from 1905 to 1912.
Many of the toponyms in the island date to Father Emmanuel Rougier, a French priest who leased the island from 1917 to 1939, and planted some 500,000 coconut trees there. He lived in his Paris house (now only small ruins) located at Benson Point, across the Burgle Channel from Londres at Bridges Point (today London) where he established the port. He gave the name of Poland to a village where Stanisław (Stanislaus) Pełczyński, his Polish plantation manager then lived.
Joe English, of Medford, Massachusetts, Rougier's plantation manager from 1915 to 1919, named Joe's Hill (some 12 metres; 39 feet high) after himself. English and two teenagers were marooned on the island for a year and a half (1917–1919) as transport had stopped due to the Spanish flu breaking out in Tahiti and around the world. English was later rescued by British admiral John Jellicoe. English, thinking that the rescue ship was German and the war was still in effect, pulled his revolver on the admiral Jellicoe, causing a short standoff until some explanation defused the situation.
Kiritimati was occupied by the Allies in World War II with the U.S. in control of the island garrison. The atoll was important to hold, since Japanese occupation would allow interdiction of the Hawaii-to-Australia supply route. For the first few months there were next to no recreational facilities on the island, and the men amused themselves by shooting sharks in the lagoon. The island's first airstrip was constructed at this time to supply the Air Force weather station and communications centre. The airstrip also provided rest and refuelling facilities for planes travelling between Hawaii and the South Pacific. The 1947 census listed only 47 inhabitants on the island. The U.S. Guano Islands Act claim was formally ceded by the Treaty of Tarawa between the U.S. and Kiribati. The treaty was signed in 1979 and ratified in 1983.
During the dispute over the Caroline Islands between Germany and Spain in 1885 which was arbitrated by Pope Leo XIII, the sovereignty of Spain over the Caroline and Palau islands as part of the Spanish East Indies was analysed by a commission of cardinals and confirmed by an agreement signed on 17 December 1885. Its Article 2 specifies the limits of Spanish sovereignty in South Micronesia, being formed by the Equator and 11°N Latitude and by 133° and 164° Longitude. In 1899, Spain sold the Marianas, Carolines, and Palau to Germany after its defeat in 1898 in the Spanish–American War. However Emilio Pastor Santos, a researcher of the Spanish National Research Council, claimed in 1948 that there was historical basis to argue that Kiritimati ("Acea" on the Spanish maps) and some other islands had never been considered part of the Carolines, supported by the charts and maps of the time. Despite having sought acknowledgement of the issue regarding interpretation of the treaty, no Spanish government has made any attempt to assert sovereignty over Kiritimati, and the case remains a historical curiosity.
During the Cold War, Kiritimati was used for nuclear weapons testing by the United Kingdom and the US. The United Kingdom conducted its first hydrogen bomb test series, Grapple 1–3, at Malden Island from 15 May to 19 June 1957 and used Kiritimati as the operation's main base. On 8 November 1957, the first H-bomb was detonated over the southeastern tip of Kiritimati in the Grapple X test. Subsequent tests in 1958 (Grapple Y and Z) also took place above or near Kiritimati.
The United Kingdom detonated some 5 megatonnes of TNT (21 PJ) of nuclear payload near and 1.8 megatonnes of TNT (7.5 PJ) directly above Kiritimati in 1957–1958, while the total yield of weapons tested by the United States in the vicinity of the island between 25 April and 11 July 1962 was 24 megatonnes of TNT (100 PJ). During the British Grapple X test, yield was stronger than expected, resulting in the blast demolishing buildings and infrastructure. Islanders were usually not evacuated during the nuclear weapons testing, and data on the environmental and public health impact of these tests remains contested. Servicemen believe that cancer and genetic damage were consequences of their occupational exposure and have sought apologies and compensation without success. A spokesperson for the UK's Ministry of Defence stated in 2018 that "the National Radiological Protection Board has carried out three large studies of nuclear test veterans and found no valid evidence to link participation in these tests to ill health."