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Malaysian Standard Time (MST; Malay : Waktu Piawai Malaysia, WPM or Malay : Waktu Standard Malaysia, WSM) or Malaysian Time (MYT) is the standard time used in Malaysia. It is 8 hours ahead of Coordinated Universal Time (UTC). [1] Malaysia does not observe daylight saving time.
The local mean time in Kuala Lumpur was originally GMT+06:46:46, while the local mean time in Kuching was 07:21:20. Peninsular Malaysia used the local mean time in Kuala Lumpur until 1 January 1901, when they changed to Singapore mean time GMT+06:55:25; this changed to GMT+07:00 in 1905. Between the end of the Second World War and the formation of Malaysia on 16 September 1963, it was known as British Malayan Standard Time, which was GMT+07:30. At 23:30 hours local time of 31 December 1981, people in Peninsular Malaysia adjusted their clocks and watches ahead by 30 minutes to become 00:00 hours local time of 1 January 1982, to match the time used in East Malaysia, which is GMT+08:00. Singapore Standard Time followed suit and has continued to use the same time as Malaysia.
| Period in use | Time offset from GMT | Name of Time (unofficial) |
|---|---|---|
| Prior to 1 January 1901 | GMT+06:46:46 | British Malayan Mean Time |
| 1 January 1901 – 31 May 1905 | GMT+06:55:25 | Singapore Mean Time |
| 1 June 1905 – 31 December 1932 | GMT+07:00 | Standard Zone Time |
| 1 January 1933 – 31 August 1941 | GMT+07:20 | Malaya Daylight Time/Malaya Standard Time |
| 1 September 1941 – 15 February 1942 | GMT+07:30 | Malaya Standard Time |
| 16 February 1942 – 11 September 1945 | GMT+09:00 | Tokyo Standard Time |
| 12 September 1945 – 31 December 1981 | GMT+07:30 | Malaya Standard Time/Malaysia Standard Time |
| 1 January 1982 – present | GMT+08:00 | Malaysian Standard Time |
| Period in use | Time offset from GMT | Name of Time (unofficial) |
|---|---|---|
| Prior to 1 March 1926 | GMT+07:21:20 | Kuching Mean Time |
| 1 March 1926 – 31 December 1932 | GMT+07:30 | North Borneo Standard Time& Sarawak Standard Time |
| 1 January 1933 - 15 February 1942 | GMT+08:00 | North Borneo & Sarawak Standard Time |
| 16 February 1942 – 11 September 1945 | GMT+09:00 | Tokyo Standard Time |
| 12 September 1945 – 31 December 1981 | GMT+08:00 | North Borneo/Sabah Standard TimeandSarawak Standard Time |
| 1 January 1982 – present | GMT+08:00 | Malaysian Standard Time |
Prime Minister of Malaysia Mahathir Mohamad declared that people in Peninsular Malaysia would adjust their clocks ahead by 30 minutes to match the time in use in East Malaysia (GMT+08:00) on 31 December 1981. The time was switched on 1 January 1982 from 00:00 (old time) to 00:30 (new time). [2] This is enforced in law through the Malaysian Standard Time Act 1981. It is noted that the official law in use still reference to the Greenwich Mean Time (GMT) and is not updated to use Coordinated Universal Time (UTC). [1] .
On 1 January 1990, the Malaysian Cabinet appointed the National Metrology Laboratory (SIRIM) as the official timekeeper of Malaysia. The cuurent timekeeping references to the Coordinated Universal Time (UTC) standard +00:00 area, offset forward by 8 hours (UTC+08:00). This timescale is derived from five atomic clocks maintained by SIRIM and is always within 0.9 seconds of the legal time. [3]
The IANA time zone database contains two zones for Malaysia in the file zone.tab:
| c.c.* | coordinates* | TZ* | comments* | UTC offset | UTC offset DST | Notes |
|---|---|---|---|---|---|---|
| MY | +0310+10142 | Asia/Kuala_Lumpur | Malaysia (peninsula) | +08:00 | ||
| MY | +0133+11020 | Asia/Kuching | Sabah, Sarawak | +08:00 |
Greenwich Mean Time (GMT) is the local mean time at the Royal Observatory in Greenwich, London, counted from midnight. At different times in the past, it has been calculated in different ways, including being calculated from noon; as a consequence, it cannot be used to specify a particular time unless a context is given. The term "GMT" is also used as one of the names for the time zone UTC+00:00 and, in UK law, is the basis for civil time in the United Kingdom.
A time zone is an area which observes a uniform standard time for legal, commercial and social purposes. Time zones tend to follow the boundaries between countries and their subdivisions instead of strictly following longitude, because it is convenient for areas in frequent communication to keep the same time.
Japan Standard Time, or Japan Central Standard Time, is the standard time zone in Japan, 9 hours ahead of UTC (UTC+09:00). Japan does not observe daylight saving time, though its introduction has been debated on several occasions. During World War II, the time zone was often referred to as Tokyo Standard Time.
In the United States, time is divided into nine standard time zones covering the states, territories and other US possessions, with most of the country observing daylight saving time (DST) for approximately the spring, summer, and fall months. The time zone boundaries and DST observance are regulated by the Department of Transportation, but no single map of those existed until the agency announced intentions to make one in September 2022. Official and highly precise timekeeping services (clocks) are provided by two federal agencies: the National Institute of Standards and Technology (NIST) ; and the United States Naval Observatory (USNO). The clocks run by these services are kept synchronized with each other as well as with those of other international timekeeping organizations.
Standard time is the synchronization of clocks within a geographical region to a single time standard, rather than a local mean time standard. Generally, standard time agrees with the local mean time at some meridian that passes through the region, often near the centre of the region. Historically, standard time was established during the 19th century to aid weather forecasting and train travel. Applied globally in the 20th century, the geographical regions became time zones. The standard time in each time zone has come to be defined as an offset from Universal Time. A further offset is applied for part of the year in regions with daylight saving time.
Time in New Zealand is divided by law into two standard time zones. The main islands use New Zealand Standard Time (NZST), 12 hours in advance of Coordinated Universal Time (UTC) / military M (Mike), while the outlying Chatham Islands use Chatham Standard Time (CHAST), 12 hours 45 minutes in advance of UTC / military M^ (Mike-Three).
Hong Kong Time is the time in Hong Kong, observed at UTC+08:00 all year round. The Hong Kong Observatory is the official timekeeper of the Hong Kong Time. It is indicated as Asia/Hong_Kong in the IANA time zone database.
The Newfoundland Time Zone (NT) is a geographic region that keeps time by subtracting 3.5 hours from Coordinated Universal Time (UTC) during standard time, resulting in UTC−03:30; or subtracting 2.5 hours during daylight saving time. The clock time in this zone is based on the mean solar time of the meridian 52 degrees and 30 arcminutes west of the Greenwich Observatory. It is observed solely in the Canadian province of Newfoundland and Labrador. The Newfoundland Time Zone is the only active time zone with a half-hour offset from UTC in the Americas.
Singapore Time (SGT), also known as Singapore Standard Time (SST), is used in Singapore and is 8 hours ahead of Coordinated Universal Time (UTC+08:00). Singapore does not observe daylight saving time.
UTC+08:00 is an identifier for a time offset from UTC of +08:00.
South African Standard Time (SAST) is the time zone used by all of South Africa as well as Eswatini and Lesotho. The zone is two hours ahead of UTC (UTC+02:00) and is the same as Central Africa Time. Daylight saving time is not observed in either time zone. Solar noon in this time zone occurs at 30° E in SAST, effectively making Pietermaritzburg at the correct solar noon point, with Johannesburg and Pretoria slightly west at 28° E and Durban slightly east at 31° E. Thus, most of South Africa's population experience true solar noon at approximately 12:00 daily.
The time in China follows a single standard time offset of UTC+08:00, where Beijing is located, even though the country spans five geographical time zones. It is the largest sovereign nation in the world that officially observes only one time zone.
Thailand follows UTC+07:00, which is 7 hours ahead of UTC. The local mean time in Bangkok was originally UTC+06:42:04. Thailand used this local mean time until 1920, when it changed to Indochina Time, UTC+07:00; ICT is used all year round as Thailand never observed daylight saving time. Thailand shares the same time zone with Vietnam, Cambodia, Laos, Christmas Island, and Western Indonesia, as well as parts of Russia.
UTC+07:30 is an identifier for a time offset from UTC of +07:30.
The Republic of Indonesia, a country located in Southeast Asia has three time zones. Western Indonesia Time is seven hours ahead (UTC+07:00) of the Coordinated Universal Time (UTC), used in the islands of Sumatra, Java, and the western half of Kalimantan. Central Indonesia Time is eight hours ahead (UTC+08:00), used in the eastern half of Kalimantan, as well as all of Bali, the Lesser Sunda Islands, and Sulawesi. Eastern Indonesia Time is nine hours ahead (UTC+09:00), used in the Maluku Islands and Western New Guinea.
The Chamorro Time Zone, formerly the Guam Time Zone, is a United States time zone which observes standard time ten hours ahead of Coordinated Universal Time (UTC+10:00). The clock time in this zone is based on the mean solar time of the 150th meridian east of the Greenwich Observatory.
Metropolitan France uses Central European Time as its standard time, and observes Central European Summer Time from the last Sunday in March to the last Sunday in October. With its overseas territories, France uses 12 different time zones, more than any other country in the world.
Ireland uses Irish Standard Time in the summer months and Greenwich Mean Time in the winter period.
Time in the Kingdom of the Netherlands is denoted by Central European Time during the winter as standard time in the Netherlands, which is one hour ahead of coordinated universal time (UTC+01:00), and Central European Summer Time (CEST) during the summer as daylight saving time, which is two hours ahead of coordinated universal time (UTC+02:00). The Caribbean Netherlands – which consist of the islands of Bonaire, Sint Eustatius and Saba – all observe Atlantic Standard Time (AST) year-round, which is four hours behind coordinated universal time (UTC−04:00).
Nigeria observes West Africa Time (WAT), which is one hour ahead of Coordinated Universal Time (UTC+01:00), year-round as standard time. Nigeria has never observed daylight saving time. It shares WAT with fourteen other countries in Africa. Nigeria's local mean time was UTC+00:13:35.
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