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Time in Thailand : ウィキペディア英語版 | Time in Thailand Thailand follows UTC+7, which is seven hours ahead of Greenwich Mean Time and Coordinated Universal Time. The local mean time in Bangkok was originally GMT+06:42:04.〔(Daylight saving time dates for Thailand - Bangkok between 1900 and 1924 )〕 Thailand used this local mean time until 1920, when it changed to Indochina Time, GMT+07:00. == History ==
*Prior to 1 January 1901 locations in Siam with an astronomical observatory would adopt local mean time based on the observatory's geographic position. Chiang Mai Province and two other provinces each had an observatory, hence, each province had its own distinct local mean time, with minutes of difference between the three locations. *On 1 April 1920 the mean time of the 105th meridian was adopted by Siam as the new standard time. The mean time of the 105th meridian is UTC+07:00 hours ahead of Greenwich Mean Time (i.e., local mean time at the Greenwich Royal Observatory near London, United Kingdom).
抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)』 ■ウィキペディアで「Time in Thailand」の詳細全文を読む
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