National Standard Time is the official

time zone A time zone is an area which observes a uniform standard time for legal, Commerce, commercial and social purposes. Time zones tend to follow the boundaries between Country, countries and their Administrative division, subdivisions instead of ...

Taiwan Taiwan, officially the Republic of China (ROC), is a country in East Asia, at the junction of the East and South China Seas in the northwestern Pacific Ocean, with the People's Republic of China (PRC) to the northwest, Japan to the nort ...

defined by an

UTC offset The UTC offset is the difference in hours and minutes between Coordinated Universal Time (UTC) and local solar time, at a particular place. This difference is expressed with respect to UTC and is generally shown in the format , , or . So if the tim ...

of +08:00. This standard is also known as Taipei Time () or Taiwan Time ().

History

The first

standard in

was enforced on 1 January 1896, the second year of

Taiwan under Japanese rule The island of Taiwan, together with the Penghu Islands, became a dependency of Japan in 1895, when the Qing dynasty ceded Fujian-Taiwan Province in the Treaty of Shimonoseki after the Japanese victory in the First Sino-Japanese War. The sh ...

. The standard was called with time offset of UTC+08:00, based on 120°E longitude. On 1 October 1937, the Western Standard Time zone was abolished and the , with time offset of UTC+09:00, was enforced in the entire country of

Japan Japan ( ja, 日本, or , and formally , ''Nihonkoku'') is an island country in East Asia. It is situated in the northwest Pacific Ocean, and is bordered on the west by the Sea of Japan, while extending from the Sea of Okhotsk in the north ...

including

. This time was used until the end of the

Second World War World War II or the Second World War, often abbreviated as WWII or WW2, was a world war that lasted from 1939 to 1945. It involved the vast majority of the world's countries—including all of the great powers—forming two opposin ...

. On 21 September 1945, the

Governor-General of Taiwan The governor-general of Taiwan ( ja, 臺灣總督, Taiwan Sōtoku) was the head of the Government-General of Taiwan in the Japanese era (including Formosa and the Pescadores) when they were part of the Empire of Japan, from 1895 to 1945. The Jap ...

announced that the order issued in 1937 was revoked. Time Memorial Day was observed every 10 June from 1921 to 1941, which led to an increase in the observance of an official time. After the war's end, Taiwan was annexed to the five time zones system of the

Republic of China Taiwan, officially the Republic of China (ROC), is a country in East Asia, at the junction of the East and South China Seas in the northwestern Pacific Ocean, with the People's Republic of China (PRC) to the northwest, Japan to the northeast ...

and was classified in the "Chungyuan Standard Time" with time offset of UTC+08:00. After the

Chinese Civil War The Chinese Civil War was fought between the Kuomintang-led government of the Republic of China and forces of the Chinese Communist Party, continuing intermittently since 1 August 1927 until 7 December 1949 with a Communist victory on m ...

in 1949, the

Government of the Republic of China The Government of the Republic of China, is the national government of the Republic of China whose ''de facto'' territory currently consists of Taiwan, Penghu, Kinmen, Matsu and other island groups in the "free area". Governed by the De ...

retreated to Taiwan and lost nearly all the territory in

mainland China "Mainland China" is a geopolitical term defined as the territory governed by the People's Republic of China (including islands like Hainan or Chongming), excluding dependent territories of the PRC, and other territories within Greater China. ...

. Since then, the five time zones system was no longer implemented except the Chungyuan Standard Time in Taiwan. Due to the fact that the term "Chungyuan" (

Zhongyuan Zhongyuan (), the Central Plain(s), also known as Zhongtu (, lit. 'central land') and Zhongzhou (, lit. 'central region'), commonly refers to the part of the North China Plain surrounding the lower and middle reaches of the Yellow River, centere ...

) refers to the Central Plain of China, the government gradually phased out the name in favor of "National Standard Time", though some radio channels continued using "Chungyuan", most notably the Broadcasting Corporation of China until 2007. Other alternatives include "Taiwan Standard Time" (), "Taipei Time" () and "Formosan Time" ().

Daylight saving time Daylight saving time (DST), also referred to as daylight savings time or simply daylight time (United States, Canada, and Australia), and summer time (United Kingdom, European Union, and others), is the practice of advancing clocks (typicall ...

was implemented in

after the Second World War on the summer of 1946–1961, 1974, 1975, 1979. In October 2017, a petition took place to change the offset to UTC+09:00, which was responded by an assessment of potential impact by the

government A government is the system or group of people governing an organized community, generally a state. In the case of its broad associative definition, government normally consists of legislature, executive, and judiciary. Government is a ...

Present development

National Standard Time is now managed by the Bureau of Standards, Metrology and Inspection (BSMI) under the Ministry of Economic Affairs. The time is released according to the caesium

atomic clocks An atomic clock is a clock that measures time by monitoring the resonant frequency of atoms. It is based on atoms having different energy levels. Electron states in an atom are associated with different energy levels, and in transitions betwee ...

aggregated by National Standard Time and Frequency Laboratory under

Chunghwa Telecom Chunghwa Telecom Company, Ltd. () (, ) is the largest integrated telecom service provider in Taiwan, and the incumbent local exchange carrier of PSTN, Mobile, and broadband services in the country. History Chunghwa Telecom was founded as ...

after consulting the data provided by

International Bureau of Weights and Measures The International Bureau of Weights and Measures (french: Bureau international des poids et mesures, BIPM) is an intergovernmental organisation, through which its 59 member-states act together on measurement standards in four areas: chemistry, ...

. National Standard Time used in

is also the same as

Hong Kong Hong Kong ( (US) or (UK); , ), officially the Hong Kong Special Administrative Region of the People's Republic of China ( abbr. Hong Kong SAR or HKSAR), is a city and special administrative region of China on the eastern Pearl River Delt ...

Macau Macau or Macao (; ; ; ), officially the Macao Special Administrative Region of the People's Republic of China (MSAR), is a city and special administrative region of China in the western Pearl River Delta by the South China Sea. With a pop ...

, Ulaanbaatar

Mongolia Mongolia; Mongolian script: , , ; lit. "Mongol Nation" or "State of Mongolia" () is a landlocked country in East Asia, bordered by Russia to the north and China to the south. It covers an area of , with a population of just 3.3 million, ...

Philippines The Philippines (; fil, Pilipinas, links=no), officially the Republic of the Philippines ( fil, Republika ng Pilipinas, links=no), * bik, Republika kan Filipinas * ceb, Republika sa Pilipinas * cbk, República de Filipinas * hil, Republ ...

Malaysia Malaysia ( ; ) is a country in Southeast Asia. The federation, federal constitutional monarchy consists of States and federal territories of Malaysia, thirteen states and three federal territories, separated by the South China Sea into two r ...

Singapore Singapore (), officially the Republic of Singapore, is a sovereign island country and city-state in maritime Southeast Asia. It lies about one degree of latitude () north of the equator, off the southern tip of the Malay Peninsula, borde ...

Western Australia Western Australia (commonly abbreviated as WA) is a state of Australia occupying the western percent of the land area of Australia excluding external territories. It is bounded by the Indian Ocean to the north and west, the Southern Ocean to th ...

Brunei Brunei ( , ), formally Brunei Darussalam ( ms, Negara Brunei Darussalam, Jawi alphabet, Jawi: , ), is a country located on the north coast of the island of Borneo in Southeast Asia. Apart from its South China Sea coast, it is completely sur ...

and Central

Indonesia Indonesia, officially the Republic of Indonesia, is a country in Southeast Asia and Oceania between the Indian and Pacific oceans. It consists of over 17,000 islands, including Sumatra, Java, Sulawesi, and parts of Borneo and New Guine ...

IANA time zone database

The

IANA time zone database The tz database is a collaborative compilation of information about the world's time zones, primarily intended for use with computer programs and operating systems. Paul Eggert is its current editor and maintainer, with the organizational backi ...

contains one zone for Taiwan, named Asia/Taipei.

Notes

Words in native languages

References

External links

Bureau of Standards, Metrology and Inspection, Ministry of Economic Affairs, the Republic of China
{{DEFAULTSORT:Time In Taiwan Time zones