Jst japan standard time

Standard Time in Japan is legally defined to represent the local time at the th eastern meridian, an arrangement that originated in the Meiji era and dates back as far as [1]. Considering that Earth rotates degrees in 24 hours, this means that time in Japan is exactly 9 buxfer ahead of the time in Greenwich, which used to provide the standard known as Jst japan standard time Mean Time GMTbased on exact astronomical measurements. Today, jst japan standard time, the international time scale of Coordinated Universal Time UTC is based on precise atomic clocks, but the 9-hour time difference of Japan Standard Time has been maintained.

Compare the local time of two timezones, countries or cities of the world. What time is it? Current local time in Japan Standard Time. Time Zone Converter Time Difference Calculator Compare the local time of two timezones, countries or cities of the world. Tokyo Tokyo.

Jst japan standard time

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Wireless Networks Research Center. Fixed Term Research Engineer. Terahertz Technology Research Center.

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Standard Time in Japan is legally defined to represent the local time at the th eastern meridian, an arrangement that originated in the Meiji era and dates back as far as [1]. Considering that Earth rotates degrees in 24 hours, this means that time in Japan is exactly 9 hours ahead of the time in Greenwich, which used to provide the standard known as Greenwich Mean Time GMT , based on exact astronomical measurements. Today, the international time scale of Coordinated Universal Time UTC is based on precise atomic clocks, but the 9-hour time difference of Japan Standard Time has been maintained. The Japanese Ministry of Internal Affairs and Communications MIC is responsible for providing standard frequencies, transmitting standard radio waves, and reporting standard time [2]. These tasks have been assigned to us at the National Institute of Information and Communications Technology NICT , where we create, distribute and compare Japan Standard Time signals, both nationally and internationally. Since we interact with time most directly through the change of day and night or the change of seasons, the original units of time were linked to the rotation of the Earth and its motion around the sun. However, the measurements required to achieve greater accuracy became more and more complex, and it was soon found that the rotation of the Earth itself constantly changes due to the effects of tidal friction and the motion of the mantle and atmosphere.

Jst japan standard time

Before the Meiji era — , each local region had its own time zone in which noon was when the sun was exactly at its culmination. As modern transportation methods, such as trains, were adopted, this practice became a source of confusion. For example, there is a difference of about 5 degrees longitude between Tokyo and Osaka and because of this, a train that departed from Tokyo would arrive at Osaka 20 minutes behind the time in Tokyo. In , Ordinance 51 was issued in response to this problem, which stated:. In the ordinance, the first clause mentions GMT, the second defines east longitude and west longitude and the third says the standard time zone would be in effect from Western Standard Time, which was used in Taiwan and some parts of Okinawa , was abolished by Ordinance in and replaced by Central Standard Time in those areas. Between and occupied Japan observed daylight saving time DST from the first Saturday in May at to the second Saturday in September at with the exception of , when the spring forward transition was the first Saturday in April at In May , former Tokyo governor Naoki Inose proposed permanently moving the country's time zone ahead by 2 hours to better align global markets and make Japan's stock market to be the first to open in the world at any given time. The United States imposed this policy as part of the Allied occupation of Japan. In , three weeks before the occupation ended, the Japanese government, which had been granted increased powers, abolished daylight saving time, and the Allied occupation authorities did not interfere.

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Gifu-shi Gifu. This is then advanced by 9 hours to provide JST. Kagoshima Kagoshima. Shimonoseki Yamaguchi. This is then advanced by 9 hours to provide JST. The two accurate time scales generated in Tokyo and Kobe are continuously compared. Gumi Gyeongsangbuk-do. Asahikawa Hokkaido. Coordinated Universal Time UTC NICT is then synthesized by an hourly adjustment of the output frequency based on the average over all clocks, calculated from the difference data. Open Innovation. However, the measurements required to achieve greater accuracy became more and more complex, and it was soon found that the rotation of the Earth itself constantly changes due to the effects of tidal friction and the motion of the mantle and atmosphere.

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Kitakyushu Fukuoka. Permanent Research Engineer. Sorong Southwest Papua. Kanazawa Ishikawa. Shizuoka Shizuoka. Daegu Daegu. Finally nine hours are added to obtain JST. The two accurate time scales generated in Tokyo and Kobe are continuously compared. Yokohama Kanagawa. Kawagoe Saitama. Suwon Gyeonggi-do. Nara-shi Nara. Ansan-si Gyeonggi-do.