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UTC+11:30
UTC+11:30 is an identifier for a +11:30 hour time offset from UTC. This timezone has been used as standard time in Norfolk Island and New Zealand, but is no longer used as a time zone anywhere.
==Historical use==
On November 2, 1868, New Zealand officially adopted a standard time to be observed nationally, and was perhaps the first country to do so. It was based on the longitude 172° 30' East of Greenwich, that is 11 hours 30 minutes ahead of Greenwich Mean Time. This standard was known as New Zealand Mean Time (NZMT). Today this would be around the same zone covered by UTC+11:30. New Zealand changed from NZMT to New Zealand Standard Time (NZST) as GMT+1200 in 1946 (after using this timezone as a daylight saving time since 1928, including permanent daylight saving from 1941).〔(【引用サイトリンク】title=Daylight Saving History )〕 It was officially changed to 12 hours in advance of UTC in 1974.〔(【引用サイトリンク】title=Daylight Saving )〕
Norfolk Island's standard time (NFT) was on UTC+11:30 until 4 October 2015, when it was changed to UTC+11:00.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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