Reunified
Vietnam
Vietnam or Viet Nam ( vi, Việt Nam, ), officially the Socialist Republic of Vietnam,., group="n" is a country in Southeast Asia, at the eastern edge of mainland Southeast Asia, with an area of and population of 96 million, making i ...
follows
Indochina Time
UTC+07:00 is an identifier for a time offset from UTC of +07:00. In ISO 8601 the associated time would be written as . It is 7 hours ahead of UTC, meaning that when the time in UTC areas is midnight (00:00), the time in UTC+07:00 areas would ...
(ICT), which is seven hours ahead of
UTC, ICT is used all year round as Vietnam does not observe
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 ...
. Vietnam shares the same time zone with
Thailand
Thailand ( ), historically known as Siam () and officially the Kingdom of Thailand, is a country in Southeast Asia, located at the centre of the Indochinese Peninsula, spanning , with a population of almost 70 million. The country is bo ...
,
Cambodia
Cambodia (; also Kampuchea ; km, កម្ពុជា, UNGEGN: ), officially the Kingdom of Cambodia, is a country located in the southern portion of the Indochinese Peninsula in Southeast Asia, spanning an area of , bordered by Thailand t ...
,
Christmas Island
Christmas Island, officially the Territory of Christmas Island, is an Australian external territory comprising the island of the same name. It is located in the Indian Ocean, around south of Java and Sumatra and around north-west of the ...
,
Laos
Laos (, ''Lāo'' )), officially the Lao People's Democratic Republic ( Lao: ສາທາລະນະລັດ ປະຊາທິປະໄຕ ປະຊາຊົນລາວ, French: République démocratique populaire lao), is a socialist ...
, and Western
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 ...
.
Vietnam referenced
ISO 8601
ISO 8601 is an international standard covering the worldwide exchange and communication of date and time-related data. It is maintained by the Geneva-based International Organization for Standardization (ISO) and was first published in 1988, wi ...
under in 1998 and then created its own standard TCVN 6398-1:1998.
History
* After Phủ Liễn Observatory was built, French Indochina announced all states (consisting of north-Vietnamese
Tonkin
Tonkin, also spelled ''Tongkin'', ''Tonquin'' or ''Tongking'', is an exonym referring to the northern region of Vietnam. During the 17th and 18th centuries, this term referred to the domain ''Đàng Ngoài'' under Trịnh lords' control, includi ...
, central-Vietnamese
Annam, south-Vietnamese
Cochinchina
Cochinchina or Cochin-China (, ; vi, Đàng Trong (17th century - 18th century, Việt Nam (1802-1831), Đại Nam (1831-1862), Nam Kỳ (1862-1945); km, កូសាំងស៊ីន, Kosăngsin; french: Cochinchine; ) is a historical exony ...
, as well as
Cambodia
Cambodia (; also Kampuchea ; km, កម្ពុជា, UNGEGN: ), officially the Kingdom of Cambodia, is a country located in the southern portion of the Indochinese Peninsula in Southeast Asia, spanning an area of , bordered by Thailand t ...
,
Laos
Laos (, ''Lāo'' )), officially the Lao People's Democratic Republic ( Lao: ສາທາລະນະລັດ ປະຊາທິປະໄຕ ປະຊາຊົນລາວ, French: République démocratique populaire lao), is a socialist ...
and Chinese
Guangzhouwan
The Leased Territory of Guangzhouwan, officially the , was a territory on the coast of Zhanjiang in China leased to France and administered by French Indochina. The capital of the territory was Fort-Bayard, present-day Zhanjiang.
The Japan ...
) were part of 104°17′17″E longitude east of Paris meridian 2°20′14″E, or 106°37′30″E from
Greenwich Mean Time
Greenwich Mean Time (GMT) is the Local mean time, mean solar time at the Royal Observatory, Greenwich, Royal Observatory in Greenwich, London, counted from midnight. At different times in the past, it has been calculated in different ways, i ...
from 00:00, 1 July 1906 onward.
* In 1911,
Metropolitan France
Metropolitan France (french: France métropolitaine or ''la Métropole''), also known as European France (french: Territoire européen de la France) is the area of France which is geographically in Europe. This collective name for the European ...
adopted
UTC±00:00 (the
solar time
Solar time is a calculation of the passage of time based on the position of the Sun in the sky. The fundamental unit of solar time is the day, based on the synodic rotation period. Two types of solar time are apparent solar time (sundial ti ...
of
Greenwich
Greenwich ( , ,) is a town in south-east London, England, within the ceremonial county of Greater London. It is situated east-southeast of Charing Cross.
Greenwich is notable for its maritime history and for giving its name to the Greenwich ...
) as its official time, and used it until 1940 (with
UTC+01:00 used during the summers from 1916 to 1940), forcing French Indochina observed UTC+07:00 from 00:00, 1 May 1911.
* Following change in time zone of
Vichy authorities, French Indochina was integrated to UTC+08:00 skipping 60 minutes at 23:00, 31 December 1942.
* The
Empire of Japan
The also known as the Japanese Empire or Imperial Japan, was a historical nation-state and great power that existed from the Meiji Restoration in 1868 until the enactment of the post-World War II 1947 constitution and subsequent fo ...
occupied Vichy French Indochina fully. Indochinese regions thereafter followed Tokyo time zone (UTC+09:00), skipping 60 minutes at 23:00, 14 March 1945.
* By
August General Uprising, the Fall of
Empire of Vietnam
The Empire of Vietnam (; Literary Chinese and Contemporary Japanese: ; Modern Japanese: ja, ベトナム帝国, Betonamu Teikoku, label=none) was a short-lived puppet state of Imperial Japan governing the former French protectorates of Annam ...
and the
, Provisional Uniform Government of the
Democratic Republic of Vietnam
North Vietnam, officially the Democratic Republic of Vietnam (DRV; vi, Việt Nam Dân chủ Cộng hòa), was a socialist state supported by the Soviet Union (USSR) and the People's Republic of China (PRC) in Southeast Asia that existed f ...
took control, announcing UTC+07:00 as official time zone on 2 September 1945. Whilst, the then under-attack regions of Vietnam, Laos and Cambodia adopted UTC+08:00 and non-attacked regions (at the time and even after the
1954 Geneva Conference
The Geneva Conference, intended to settle outstanding issues resulting from the Korean War and the First Indochina War, was a conference involving several nations that took place in Geneva, Switzerland, from 26 April to 20 July 1954. The part o ...
) adopted UTC+07:00 from
April 1
Events Pre-1600
* 33 – According to one historian's account, Jesus Christ's Last Supper is held.
* 527 – Byzantine Emperor Justin I names his nephew Justinian I as co-ruler and successor to the throne.
*1081 – Alexios I Kom ...
, 1947: Laos (part of Indochina) from 15 April 1954, Hanoi from October 1954, Haiphong from May 1955.
* Under control of
State of Vietnam
The State of Vietnam ( vi, Quốc gia Việt Nam; Chữ Nôm: 國家越南; french: État du Viêt-Nam) was a governmental entity in Southeast Asia that existed from 1949 until 1955, first as a member of the French Union and later as a country ...
, South Vietnam adopted UTC+07:00 from 00:00, 1 July 1955.
*South Vietnam time zone was changed to UTC+08:00 from 23:00, 31 December 1959, passing 60 minutes.
*North Vietnam confirmed official UTC+07:00 from 1 January 1968.
*Following the
Fall of Saigon
The Fall of Saigon, also known as the Liberation of Saigon by North Vietnamese or Liberation of the South by the Vietnamese government, and known as Black April by anti-communist overseas Vietnamese was the capture of Saigon, the capital of ...
in April–May 1975, reunified Vietnam then observes UTC+07:00 with
Saigon
, population_density_km2 = 4,292
, population_density_metro_km2 = 697.2
, population_demonym = Saigonese
, blank_name = GRP (Nominal)
, blank_info = 2019
, blank1_name = – Total
, blank1_ ...
(and other southern parts) delaying 60 minutes on 13 June 1975.
Time in
French Indochina
French Indochina (previously spelled as French Indo-China),; vi, Đông Dương thuộc Pháp, , lit. 'East Ocean under French Control; km, ឥណ្ឌូចិនបារាំង, ; th, อินโดจีนฝรั่งเศส, ...
Time in
North Vietnam
North Vietnam, officially the Democratic Republic of Vietnam (DRV; vi, Việt Nam Dân chủ Cộng hòa), was a socialist state supported by the Soviet Union (USSR) and the People's Republic of China (PRC) in Southeast Asia that existed f ...
Time in
South Vietnam
South Vietnam, officially the Republic of Vietnam ( vi, Việt Nam Cộng hòa), was a state in Southeast Asia that existed from 1955 to 1975, the period when the southern portion of Vietnam was a member of the Western Bloc during part of th ...
Time in Reunified Vietnam
See also
*
ASEAN Common Time
The ASEAN Common Time (ACT) is a proposal to adopt a standard time for all Association of Southeast Asian Nations member states. It was proposed in 1995 by Singapore, and in 2004 and 2015 by Malaysia to make business across countries easier. The ...
(ACT)
*
Indochina Time
UTC+07:00 is an identifier for a time offset from UTC of +07:00. In ISO 8601 the associated time would be written as . It is 7 hours ahead of UTC, meaning that when the time in UTC areas is midnight (00:00), the time in UTC+07:00 areas would ...
(ICT)
*
Time in Cambodia Cambodia follows UTC+07:00, which is 7 hours ahead of UTC. The local mean time in Phnom Penh was originally UTC+7:19. Cambodia used this local mean time until 1920, when it changed to Indochina Time, UTC+07:00; ICT is used all year round as Cambod ...
*
Time in Laos Time in Laos is given by Indochina Time (ICT) ( UTC+07:00). Laos does not observe daylight saving time. Laos shares the same time zone with Cambodia, Thailand, Vietnam, Christmas Island, and Western Indonesia.
References
Laos
Laos (, ...
*
Time in Thailand
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 Thai ...
*
UTC+08:00
*
UTC+09:00
References
Bibliography
* Trần Tiến Bình (2005), ''Lịch Việt Nam thế kỷ XX-XXI (1901–2100)'', Nhà xuất bản Văn hoá Thông tin, Hanoi.
{{Asia topic, Time in
Vietnam
Vietnam or Viet Nam ( vi, Việt Nam, ), officially the Socialist Republic of Vietnam,., group="n" is a country in Southeast Asia, at the eastern edge of mainland Southeast Asia, with an area of and population of 96 million, making i ...