World map time zones
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UTC offset can range from UTC-12:00 to UTC+14:00. Generally, time zones are defined as + or - an integer number of hours in relation to UTC for example, UTC-05:00, UTC+08:00, and so on. UTC breaks time into days, hours, minutes, and seconds, where days are usually defined in terms of the Gregorian calendar. Most time zones that are on land are offset from UTC. UTC is not dependent on daylight saving time (DST), though some countries switch between time zones during their DST period, such as the United Kingdom using British Summer Time in the summer months. UTC, which is based on highly precise atomic clocks and the Earth's rotation, is the new standard of today. Although GMT used to be a time standard, it is now mainly used as the time zone for certain countries in Africa and Western Europe. Although GMT and Coordinated Universal Time (UTC) essentially reflect the same time, GMT is a time zone, while UTC is a time standard that is used as a basis for civil time and time zones worldwide. Greenwich Mean Time (GMT) is the mean solar time at the Royal Observatory located in Greenwich, London, considered to be located at a longitude of zero degrees. They are often based on the boundaries of countries or lines of longitude. The IANA time zone naming is supported in the web map and arcade today and future updates will add support in ArcGIS Pro and REST.Related Time Calculator | Date CalculatorĪ time zone is a region on Earth that uses a uniform time. So if you start to type Aus to search for Australia, you will see the results filter down. The list of IANA time zones is searchable by continent or city names. By default, it will select the time zone reported by the browser to help with selection.
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The IANA list of time zones can be identified by continent or ocean along with the largest city within the region containing the clocks used to define the time zone. An example with different naming you may see would be between Windows using Central European Standard Time while other sources may call it Central European Time.
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This list of time zones was generated to solve the problems that came from different time zone naming conventions being used around the world. For those not familiar with the IANA time zone, this naming is standardized by the Internet Assigned Numbers Authority. Using a specific time zone will set the time zone value to a specific IANA time zone. Under Device time zone is Specific time zone. This would be the same experience as well for other areas where date-time values are displayed like tables and time slider. Below is a web map showing the hurricanes web map showing how the popup displays for viewers in EST and PST. This means you won’t see a change in behavior with date field display compared to your previous experiences and won’t alter maps once resaved. This matches the behavior for web maps before the October 2023 release. Check out the examples below to learn which option is best for your map and viewers.īy default, web maps will use the option Device time zone. These 3 options give you the control you will need to set the experience on date fields in the map. To bring a unifying experience across the platform and give additional control to map authors we are introducing the Time zone setting in Map Viewer. Then if you opened the map in ArcGIS Pro the time zone would be presented with no adjustments coming from device time zones. For example with this sample web map showing hurricanes would display date-time in EST to me with my device set to EST and my coworkers on the west coast would see the times displayed in PST when viewing a popup or table. Before this release, the display of date-time in web applications in ArcGIS Online would always use the device time zone.