4 However, the need for coordination among all transportation modes became increasingly important after World War II. 4 3 That year, five time zones were officially adopted as the US entered World War I: the Eastern, Central, Mountain, Pacific, and Alaska zones, all of which are still in use today. 3 In 1918, the federal organization in charge of railroad regulation - the Interstate Commerce Commission (ICC) - was given the power to address coordination concerns. 2īecause the development of standardized time was transportation-driven, the government coordination of time zones was handled by transportation agencies. 1 As a result, the major railroad companies began to operate on a coordinated system of four time zones starting in 1883. 2 Due to this lack of time standardization, train scheduling proved difficult to coordinate, resulting in missed connections and collisions. 2 With the proliferation of railroads, faster travel became possible across large geographies, and travelers could sometimes arrive at an earlier local time than they had departed. 1 The resulting time differences between adjacent towns and cities were not critical when it took days to travel from place to place. Advisory Council on Transportation Statisticsīefore the establishment of time zones in 1883, there were more than 144 local times in North America.National Transportation Knowledge Network.National Transportation Library Main - Library.Vehicle Inventory and Use Survey (VIUS).Transportation Statistics Annual Reports.Local Area Transportation Characteristics (LATCH dataset).Government Transportation Financial Statistics.Freight Logistics Optimization Works (FLOW).Electric Vehicle Inventory and Use Survey (eVIUS).Statistical Products and Data Main - Statistical 1.Transportation Maps and Geospatial Data.Introduction to Transportation Statistics.In 1974, two years after Coordinated Universal Time (UTC) was set as the international time standard, New Zealand Standard Time (NZST) was officially defined as UTC+12 in the Time Act 1974. The time change was made permanent by the Standard Time Act 1945. In 1941, during World War II, clocks were set forward 30 minutes, increasing New Zealand's offset from GMT to 12 hours. New Zealand Mean Time, adopted on November 2, 1868, was 11 hours and 30 minutes ahead of Greenwich Mean Time (GMT). New Zealand was one of the first countries in the world to officially adopt a nationally observed standard time. The New Zealand dependency of Tokelau has no Daylight Saving Time (DST). Time Zones Being Used in Dependencies of New Zealand Offset ![]() The Chatham Islands use Chatham Island Standard Time (CHAST) as standard time, while Chatham Island Daylight Time (CHADT) is observed during the DST period. In the country's mainland, New Zealand Standard Time (NZST) is used as standard time, while New Zealand Daylight Time (NZDT) is observed during DST. They will become active again after the next clock change as Daylight Saving Time begins or ends. ![]() The above time zones are used during other parts of the year. ![]() Time Zones Not Currently Being Observed in New Zealand Offset Tokelau, an archipelago in the Pacific and a dependency of New Zealand, brings the total to three time zones.īecause Tokelau does not use Daylight Saving Time (DST), there are only two corresponding DST time zones. The Chatham Islands, located about 860 kilometers (534 miles) east of Christchurch, have a separate time zone, which is 45 minutes ahead of mainland New Zealand. New Zealand's two main islands, North Island and South Island, both lie in the same time zone. Time Zones Currently Being Used in New Zealand Offset Business Date to Date (exclude holidays).
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