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Bangladesh Standard Time (BST) ((ベンガル語:বাংলাদেশ মান সময়)) is the time zone of Bangladesh. It is offset six hours ahead of Coordinated Universal Time, and observed as a national standard throughout the country. Bangladesh briefly observed daylight saving time (DST) in 2009 in order to cope with the ongoing electricity crisis, but in 2010 the decision was cancelled by the government of Bangladesh. The official time signal is given by the Bangladesh Standard Time is calculated on the basis of the 90.00° E longitude, which passes over the Harukandi Union of Harirampur Upazila of the Manikganj District in Dhaka Division, Bangladesh. In the IANA time zone database, it is represented by Asia/Dhaka. == History == Between 1858 and 1941, the Bengal region was under British Raj and used Calcutta time (UTC+5:53:20).〔 For a brief period in the 1940s, amidst World War II, there were a series of time zone changes in British India.〔〔 # In 1 October 1941, the region switched to UTC+06:30. # In 15 May 1942, the following year, the region switched to UTC+05:30. # In 1 September 1942, the same year, the region was returned to UTC+06:30. Following the independence of India in 1947, British India was partitioned into India and Pakistan, of which East Pakistan is now Bangladesh. The time zone of East Pakistan was not immediately affected by the partition. In 1951, the region changed its time from UTC+06:30 to UTC+06:00, the official time zone used today.〔〔 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「Bangladesh Standard Time」の詳細全文を読む スポンサード リンク
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