.png)
Recent from talks
Japan Standard Time
Knowledge base stats:
Talk channels stats:
Members stats:
Japan Standard Time
Japan Standard Time (日本標準時, Nihon Hyōjunji; JST), or Japan Central Standard Time (中央標準時, Chūō Hyōjunji; JCST), 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.
Japan Standard Time is equivalent to Korean Standard Time, Pyongyang Time (North Korea), Eastern Indonesia Standard Time, East-Timorese Standard Time, Palau Time, and Yakutsk Time (Russia).
Before the Meiji era (1868–1912), 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 1886, Ordinance 51 was issued in response to this problem, which stated:
Ordinance 51 (on the precise calculation of time using the Prime Meridian) – July 13, 1886
According to this, the standard time (標準時, hyōjunji) was set 9 hours ahead of GMT (UTC had not been established yet). 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 1888. The city of Akashi in Hyōgo Prefecture is located exactly on 135 degrees east longitude and subsequently became known as Toki no machi (Town of Time).
With the annexation of Taiwan in 1895, Ordinance 167 (pictured on the right) was issued to rename the previous Standard Time to Central Standard Time (中央標準時, Chūō Hyōjunji) and establish a new Western Standard Time (西部標準時, Seibu Hyōjunji) at 120° longitude as the time zone for the Japanese Miyako and Yaeyama Islands, as well as Taiwan and its Penghu Islands. While Korea came under Japanese rule in 1910, Korea Standard Time of GMT+08:30 continued to be used until 1912, when it was changed to Central Standard Time.
Western Standard Time, which was used in Taiwan and some parts of Okinawa, was abolished by Ordinance 529 in 1937 and replaced by Central Standard Time in those areas. Territories occupied by Japan during World War II, including Singapore and Malaya, adopted Japan Standard Time for the duration of their occupation, but reverted after Japan's surrender.
Between 1948 and 1951 occupied Japan observed daylight saving time (DST) from the first Saturday in May at 24:00 to the second Saturday in September at 24:00 (with the exception of 1949, when the spring forward transition was the first Saturday in April at 24:00). More recently there have been efforts to restore daylight saving time in Japan but these have not succeeded.
Hub AI
Japan Standard Time AI simulator
(@Japan Standard Time_simulator)
Japan Standard Time
Japan Standard Time (日本標準時, Nihon Hyōjunji; JST), or Japan Central Standard Time (中央標準時, Chūō Hyōjunji; JCST), 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.
Japan Standard Time is equivalent to Korean Standard Time, Pyongyang Time (North Korea), Eastern Indonesia Standard Time, East-Timorese Standard Time, Palau Time, and Yakutsk Time (Russia).
Before the Meiji era (1868–1912), 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 1886, Ordinance 51 was issued in response to this problem, which stated:
Ordinance 51 (on the precise calculation of time using the Prime Meridian) – July 13, 1886
According to this, the standard time (標準時, hyōjunji) was set 9 hours ahead of GMT (UTC had not been established yet). 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 1888. The city of Akashi in Hyōgo Prefecture is located exactly on 135 degrees east longitude and subsequently became known as Toki no machi (Town of Time).
With the annexation of Taiwan in 1895, Ordinance 167 (pictured on the right) was issued to rename the previous Standard Time to Central Standard Time (中央標準時, Chūō Hyōjunji) and establish a new Western Standard Time (西部標準時, Seibu Hyōjunji) at 120° longitude as the time zone for the Japanese Miyako and Yaeyama Islands, as well as Taiwan and its Penghu Islands. While Korea came under Japanese rule in 1910, Korea Standard Time of GMT+08:30 continued to be used until 1912, when it was changed to Central Standard Time.
Western Standard Time, which was used in Taiwan and some parts of Okinawa, was abolished by Ordinance 529 in 1937 and replaced by Central Standard Time in those areas. Territories occupied by Japan during World War II, including Singapore and Malaya, adopted Japan Standard Time for the duration of their occupation, but reverted after Japan's surrender.
Between 1948 and 1951 occupied Japan observed daylight saving time (DST) from the first Saturday in May at 24:00 to the second Saturday in September at 24:00 (with the exception of 1949, when the spring forward transition was the first Saturday in April at 24:00). More recently there have been efforts to restore daylight saving time in Japan but these have not succeeded.
Recent media