UTC+11:30
{{Short description|Former time zone}}
{{Infobox time zone | UTC = yes}}
UTC+11:30 is an identifier for a time offset from UTC of +11:30. It is no longer in use as of 2015.
History
This time zone was used as standard time in New Zealand and Norfolk Island.
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 was 11 hours 30 minutes ahead of Greenwich Mean Time. This standard was known as New Zealand Mean Time (NZMT).{{cite web |url= http://www.paperspast.natlib.govt.nz/cgi-bin/paperspast?a=d&cl=search&d=EP19290408.2.88&srpos=2 |title=Evening Post — 8 April 1929 — OUR TIME |work=paperspast.natlib.govt.nz |year=2011 |access-date=4 October 2015}} New Zealand changed from NZMT to New Zealand Standard Time (NZST) as UTC+12:00 in 1946 (after using this time zone as a daylight saving time since 1928, including permanent daylight saving from 1941).{{cite web |url=http://www.dia.govt.nz/Daylight-Saving-History |title=Daylight Saving History |publisher=New Zealand Department of Internal Affairs |access-date=4 October 2015}} It was officially changed to 12 hours in advance of UTC in 1946.{{cite web |url=http://www.dia.govt.nz/Daylight-Saving |title=Daylight Saving |publisher=New Zealand Department of Internal Affairs |access-date=4 October 2015}}
Norfolk Island's standard time (NFT) was on UTC+11:30 until 4 October 2015, when it was changed to UTC+11:00.{{cite press release |last=Hardgrave |first=Gary |date=3 September 2015 |url=http://regional.gov.au/territories/norfolk_island/administrator/media/2015/ni-a-mr-201526.aspx |title=Norfolk Island standard time changes 4 October 2015 |publisher=Administrator of Norfolk Island |access-date=4 October 2015}}