Christmas Island in the context of "Straits Settlements"

The Colony of Singapore was a Crown colony of the United Kingdom that encompassed what is modern-day Singapore from 1946 to 1959. During this period, Christmas Island, the Cocos (Keeling) Islands, and Labuan were also administered from Singapore. Singapore had previously been established as a British colony since 1824, and had been governed as part of the Straits Settlements since 1826. The colony was created when the Straits Settlements was dissolved shortly after the Japanese occupation of Singapore ended in 1945. The power of the British Government was vested in the governor of Singapore. The colony eventually gained partial internal self-governance in 1955, and lasted until the establishment of the State of Singapore in 1958, with full internal self-governance granted in 1959.

After a few years of self-governance, Singapore went on to merge with Malaya, Sarawak and North Borneo (Sabah) to form Malaysia on 16 September 1963, thereby completely ending 144 years of British rule in Singapore. Due to differing views in dealing with political, economic and racial issues, Singapore would eventually cease to be a part of Malaysia and become an independent sovereign country on 9 August 1965.

The Australian Indian Ocean Territories is the name since 1995 of an administrative unit under the Australian Department of Infrastructure, Transport, Regional Development, Communications and the Arts, consisting of two island groups in the Indian Ocean under Australian sovereignty:

• Christmas Island (10°29′06″S 105°38′10″E / 10.485°S 105.636°E / -10.485; 105.636 (Christmas Island)), where the administrator resides
• Cocos (Keeling) Islands (12°09′29″S 96°52′12″E / 12.158°S 96.870°E / -12.158; 96.870 (Cocos (Keeling) Islands)), where the same officer also has jurisdiction as administrator but does not reside

Each of these island components has its own shire council: the Shire of Christmas Island and the Shire of Cocos.

The states and territories are the national subdivisions and second level of government of Australia. The states are partially sovereign, administrative divisions that are self-governing polities, having ceded some sovereign rights to the federal government. They have their own constitutions, legislatures, executive governments, judiciaries and law enforcement agencies that administer and deliver public policies and programs. Territories can be autonomous and administer local policies and programs much like the states in practice, but are still legally subordinate to the federal government.

Australia has six federated states: New South Wales (including Lord Howe Island), Queensland, South Australia, Tasmania (including Macquarie Island), Victoria, and Western Australia. Australia also has ten federal territories, out of which three are internal territories: the Australian Capital Territory, the Jervis Bay Territory, and the Northern Territory on the Australian mainland; and seven are external territories: the Ashmore and Cartier Islands, the Australian Antarctic Territory, Christmas Island, the Cocos (Keeling) Islands, the Coral Sea Islands, Heard Island and McDonald Islands, and Norfolk Island that are offshore dependent territories. Every state and internal territory (except the Jervis Bay Territory) is self-governing with its own independent executive government, legislature, and judicial system, while the rest only have local government status overseen by federal departments.

The history of Southeast Asia covers the people of Southeast Asia from prehistory to the present in two distinct sub-regions: Mainland Southeast Asia (or Indochina) and Maritime Southeast Asia (or Insular Southeast Asia). Mainland Southeast Asia comprises Cambodia, Laos, Myanmar (or Burma), Peninsular Malaysia, Thailand and Vietnam whereas Maritime Southeast Asia comprises Brunei, Cocos (Keeling) Islands, Christmas Island, East Malaysia, East Timor, Indonesia, Philippines and Singapore.

The earliest Homo sapiens presence in Mainland Southeast Asia can be traced back to 70,000 years ago and to at least 50,000 years ago in Maritime Southeast Asia. Since 25,000 years ago, East Asian-related (basal East Asian) groups expanded southwards into Maritime Southeast Asia from Mainland Southeast Asia. As early as 10,000 years ago, Hoabinhian settlers from Mainland Southeast Asia had developed a tradition and culture of distinct artefact and tool production. During the Neolithic, Austroasiatic peoples populated Mainland Southeast Asia via land routes, and sea-borne Austronesian immigrants preferably settled in Maritime Southeast Asia. The earliest agricultural societies that cultivated millet and wet-rice emerged around 1700 BCE in the lowlands and river floodplains of Southeast Asia.

The Cocos (Keeling) Islands (Cocos Islands Malay: Pulu Kokos [Keeling]), officially the Territory of Cocos (Keeling) Islands (/ˈkoʊkəs/; Cocos Islands Malay: Pulu Kokos [Keeling]), are an Australian external territory in the Indian Ocean, comprising a small archipelago approximately midway between Australia and Sri Lanka and relatively close to the Indonesian island of Sumatra. The territory's dual name (official since the islands' incorporation into Australia in 1955) reflects that the islands have historically been known as either the Cocos Islands or the Keeling Islands.

The territory consists of two atolls made up of 27 coral islands, of which only two – West Island and Home Island – are inhabited. The population of around 600 people consists mainly of Cocos Malays, who mostly practise Sunni Islam and speak a dialect of Malay as their first language. The territory is administered by the Australian federal government's Department of Infrastructure, Transport, Regional Development, Communications and the Arts as an Australian external territory and together with Christmas Island (which is about 960 kilometres (600 mi) to the east) forms the Australian Indian Ocean Territories administrative grouping. However, the islanders do have a degree of self-government through the local shire council. Many public services – including health, education, and policing – are provided by the state of Western Australia, and Western Australian law applies except where the federal government has determined otherwise. The territory also uses Western Australian postcodes.

The Shire of Christmas Island is a local government area encompassing the Australian external territory of Christmas Island. Under the Christmas Island Act, Western Australian laws apply to the island, including the Local Government Act 1995.

It covers an area of 136.7 km in the Indian Ocean about 2,360 km north-west of Perth and 500 km south of Java in Indonesia. It has a population of 1,692 (LGA 2021).

Australia uses three main time zones: Australian Eastern Standard Time (AEST; UTC+10:00), Australian Central Standard Time (ACST; UTC+09:30) and Australian Western Standard Time (AWST; UTC+08:00).

Time is regulated by the individual state governments, some of which observe daylight saving time (DST). Daylight saving time (+1 hour) is used between the first Sunday in October and the first Sunday in April in jurisdictions in the south and south-east: