UTC+11:30

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. New Zealand changed from NZMT to New Zealand Standard Time as UTC+12:00 in 1946. It was officially changed to 12 hours in advance of UTC in 1946.
Norfolk Island's standard time was on UTC+11:30 until 4 October 2015, when it was changed to UTC+11:00.