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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.
The Eastern Time Zone (ET) is a time zone encompassing part or all of 23 states in the eastern part of the United States,parts of eastern Canada,and the state of Quintana Roo in Mexico.
The Pacific Time Zone (PT) is a time zone encompassing parts of western Canada,the western United States,and western Mexico. Places in this zone observe standard time by subtracting eight hours from Coordinated Universal Time (UTC−08:00). During daylight saving time,a time offset of UTC−07:00 is used.
The Alaska Time Zoneobserves standard time by subtracting nine hours from Coordinated Universal Time (UTC−09:00). During daylight saving time its time offset is eight hours (UTC−08:00). The clock time in this zone is based on mean solar time at the 135th meridian west of the Greenwich Observatory.
Central European Time (CET) is a standard time of Central,and parts of Western Europe,which is one hour ahead of Coordinated Universal Time (UTC). The time offset from UTC can be written as UTC+01:00. It is used in most parts of Europe and in a few North African countries. CET is also known as Middle European Time and by colloquial names such as Amsterdam Time,Berlin Time,Brussels Time,Madrid Time,Paris Time,Rome Time,Prague time,Warsaw Time or Romance Standard Time (RST).
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).
The Atlantic Time Zone is a geographical region that keeps standard time—called Atlantic Standard Time (AST)—by subtracting four hours from Coordinated Universal Time (UTC),resulting in UTC−04:00. AST is observed in parts of North America and some Caribbean islands. During part of the year,some portions of the zone observe daylight saving time,referred to as Atlantic Daylight Time (ADT),by moving their clocks forward one hour to result in UTC−03:00. The clock time in this zone is based on the mean solar time of the 60th meridian west of the Greenwich Observatory.
UTC+08:00 is an identifier for a time offset from UTC of +08:00.
UTC+03:00 is an identifier for a time offset from UTC of +03:00. In areas using this time offset,the time is three hours later than the Coordinated Universal Time (UTC). Following the ISO 8601 standard,a time with this offset would be written as,for example,2019-02-08T23:36:06+03:00.
Australia uses three main time zones:Australian Eastern Standard Time,Australian Central Standard Time and Australian Western Standard Time.
There are eleven time zones in Russia,which currently observe times ranging from UTC+02:00 to UTC+12:00. Daylight saving time (DST) has not been used in Russia since 26 October 2014. From 27 March 2011 to 26 October 2014,permanent DST was used.
Canada is divided into six time zones. Most areas of the country's provinces and territories operate on standard time from the first Sunday in November to the second Sunday in March and daylight saving time the rest of the year.
Jang Yeong-sil was a Korean mechanical engineer,scientist,and inventor during the Joseon Dynasty (1392–1897). Although Jang was born a peasant,King Sejong allowed Jang to work at the royal palace. Jang's inventions,such as the Cheugugi and the water gauge,highlight the technological advancements of the Joseon Dynasty.
The Borugak Jagyeongnu,classified as a scientific instrument,is the 229th National Treasure of South Korea and was designated by the South Korean government on March 3,1985. The water clock is currently held and managed by the National Palace Museum of Korea in Seoul. It dates to the time of King SeoJong of the Joseon Dynasty.
Time in North Korea,called Pyongyang Time or Standard Time of the Democratic People's Republic of Korea,is since May 2018 equal to Korea Standard Time:9 hours ahead of UTC (UTC+09:00). Like South Korea,North Korea does not currently observe daylight saving time. Time keeping in North Korea is under the State Commission for Science and Technology.
As of 2022,daylight saving time is used in the following Asian countries:
Daylight saving time (DST),also known as summer time,is the practice of advancing clocks during part of the year,typically by one hour around spring and summer,so that daylight ends at a later time of the day. As of 2023,DST is observed in most of Europe,most of North America and parts of Africa and Asia around the Northern Hemisphere summer,and in parts of South America and Oceania around the Southern Hemisphere summer. It was also formerly observed in other areas.
Jang Yeong-sil (Korean: 장영실) is a 2016 South Korean historical drama television series starring Song Il-gook,Kim Yeong-cheol,Kim Sang-kyung and Park Sun-young. It replaced The Jingbirok:A Memoir of Imjin War and aired on KBS1 from January 2,2016 to March 26,2016 on Saturdays and Sundays at 21:40 (KST) for 24 episodes.
Time in Sudan is given by a single time zone,officially denoted as Central Africa Time. Sudan has observed CAT since 1 November 2017. Sudan has not observed daylight saving time since 14 October 1985.
References
- ↑ "표준시" [Standard Time]. Doosan Encyclopedia (in Korean). Retrieved 2018-03-03.
- ↑ "KST". Geospatial Information System Glossary (in Korean). Retrieved 2018-03-03.
- ↑ "Current Local Time in South Korea". timeanddate.com.
- 1 2 Chad, Norman (1987-01-30). "Live From Seoul, 1988 Olympics Now Are Ready For Prime Time". Washington Post. ISSN 0190-8286 . Retrieved 2018-03-03.
- ↑ Chappell, Bill (2017-03-29). "The Olympics' TV Time-Delay Is Going Away, NBC Says". National Public Radio. Retrieved 2018-03-03.
- ↑ Pak, Sŏng-nae (2005). Science and Technology in Korean History: Excursions, Innovations, and Issues. Jain Publishing Company. pp. 96–99. ISBN 0895818388.
- ↑ Park, Changbom (2008). Astronomy: Traditional Korean Science. Ewha Womans University Press. p. 135. ISBN 978-8973007790.
- ↑ Yu, Jeong-in (2010-08-09). "1961년 표준자오선 동경 135도로 변경" [1961 Standard Meridian Changed to 135 Degrees East]. The Kyunghyang Shinmun. Retrieved 2018-03-03.
- ↑ "North Korea's new time zone to break from 'imperialism'". BBC News. 2015-08-07. Retrieved 2018-03-03.
- ↑ "Turning back the clock: North Korea creates Pyongyang Standard Time". Reuters. 2015-08-07. Retrieved 2018-03-03.
- ↑ Westcott, Ben; Yoonjung, Seo; Watkins, Eli (29 April 2018). "North Korea will close main nuclear test site in May, South says". CNN. Retrieved 29 April 2018.
- ↑ "혼란 주던 '30분 시차' 사라진다…서울 표준시로 "통일"" (in Korean). 2018-04-29. Retrieved 2018-04-29.
