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The 482D Master Clock manages 15 world time zones, automatically maintaining the correct time in each zone. The information here will help you decide on the zones you require, how to calculate the offset from your reference time and how to program the 482D for daylight savings time changes... |
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| The world is split up into many different time zones, all usually described by their difference from Greenwich Mean Time (GMT) or Universal Coordinated Time (UTC). The difference is not constant, as most countries add 1 hour to the clock during summer months, for daylight savings. However, they don't all make the change at the same time or on the same day, or even in the same direction, as summer in the northern hemisphere is winter in the southern. It isn't surprising that people sometimes have difficulty keeping up with the time in other countries and, as some countries span several time zones, you sometimes need to know the location of the city to get the correct time.
If you have a 482D Master Clock, this greatly simplifies the tracking of time in up to 15 world time zones, automatically adjusting the time for summer and winter in each zone on the correct date and at the correct time. When used to drive a 400A series multi-zone time display (or a number of individual time or calendar displays), you can be sure that each zone will display the correct time all the time. The tables below will help you identify the correct time zone for each country or city you wish to identify. You'll also find a description of how to program zone offsets and seasonal time changes here. Disclaimer: The information in the tables below is accurate to the best of our knowledge, and has been checked against numerous references. You should regard it as a guide only, and check both the offset and the daylight savings information with an appropriate body in the country concerned. Vortex Communications accepts no liability for any errors or omissions in this information. Europe In Europe, each country sits wholly within a single time zone. The table below lists countries alphabetically, each preceded by the name of the principal city and followed by the number of hours offset from UTC. Most European countries adopt daylight savings time on the last Sunday in March until the last Sunday in October. Some adopt the British pattern of adding an hour at 1am and putting back the clock at 2am, but most use the European pattern where the clock is put back at 3am. The 482D Master Clock allows you to select either pattern when programming a zone.
United States of America The USA spans many time zones, but most individual states sit wholly within one or other zone, (Idaho, Oklahoma, Texas and Tennessee each span two zones). States are listed below alphabetically, preceded by principal cities and followed by the number of hours behind UTC. Daylight savings time is adopted on the first Sunday in April, and ends on the last Sunday in October. Select the "US" change pattern on the 482D Master Clock to advance by an hour at 2am in the spring and drop back an hour at 3am in autumn.
Canada Canada spans 5 time zones, four of which correspond to the main time zones in the USA (Eastern, Central, Mountain & Pacific) while the eastern side of Newfoundland is in the Atlantic time zone. Canada follows the same date and pattern of daylight savings time changes that is used in the USA, so set the 482D Master Clock to "US".
Australia and New Zealand Australia spans 3 time zones from 10 hours ahead of UTC to 8 hours ahead. Both north and south islands of New Zealand sit in 1 zone, 12 hours ahead of UTC. Some of the territorial islands of these two countries sit in different time zones again, but these have not been included here. Daylight savings time operate in Australia from the last Sunday in October until the last Sunday in March, using the European pattern of time change. New Zealand starts at the beginning of October and finishes in mid-March.
The Middle East and Indian Sub-Continent Not every country is listed here, but there is a representative selection for each time zone. The approach to daylight savings varies, so check with a local organisation to be sure that you get the correct information.
The Far East and Pacific Rim Not every country is listed here, but there is a representative selection for each time zone. Each country sits in a single zone, including all of mainland China.
South America South America is mainly in the southern hemisphere and those countries which adopt daylight savings generally do so from October to February. Brazil spans 3 time zones with the east coast 3 hours behind UTC, and all of Brazil follows the southern hemisphere daylight savings, despite part of the country being north of the equator.
Africa Not every country, but a representative selection from each time zone here. As with other countries predominantly in the equatorial region, daylight savings is not always adopted.
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