Sorted by time slots from lowest to highest St. John's) - Northern Territory of Australia - South Australia.Įucla - Chatham Island - Nepal, adjusts to a 45 minute or 3/4 hour time slot. In this way, it can be easier to distinguish them from most countries that adhere to the 1-hour time slot.Ĭountries or localities that conform to a time slot of 30' are: Afghanistan- Chatham Islands - Eucla - India ( Sri Lanka) - Iran - Lord Howe Island (in winter) - Myanmar - Newfoundland ( St. To differentiate those countries from the rest, these intermediate time slots have been associated with 5 additional colors. Some countries do not adjust like most, to the exact hour of 60 minutes (1 hour), corresponding to the multiples of meridian of 15º. In the same way it would be with the rest of countries and colors. More eg: between New York and Saudi Arabia, both countries in yellow, (except during New York's summer time), the difference between those countries will be 8 hours, or if it were in green, Colorado and France, all them (multiples of 4 h). If we wanted to see at a glance the time difference between California and the United Kingdom (both countries with the same pink time zone color), the time difference between both countries will be 8 hours, (multiple of 4 hours) (except when one of these countries, this one using daylight saving time and the other one not). In turn, these colors can be practical to visualize the time difference between countries with the same color, since they are multiples of 4 hours. Indiana introduced DST in 2006.4 colors to differentiate the time zones - that conform to the time bands of 1 hour = meridians of 15º. Most of Arizona and Hawaii don't use DST. World Time Zones Canada Time Zone Map USA Time Zone Map Mexico Time Zone Map USA & Canada Time Zones. In addition the uninhabited atolls of Baker Island (AoE) and Wake Island (WAKT) add to the time zone count, making 11 the total number of time zones in the US.Īlmost all states in the US use Daylight Saving Time (DST). There are 9 official time zones according to the law. The time zones in the law are defined by their offset from Coordinated Universal Time (UTC). Code, Title 15, Chapter 6, Subchapter IX - Standard Time. Time zones in the USA are defined in the U.S. Since 1967, the US Department of Transportation (DOT) has been responsible for governing time zones in the country. The US was divided into 4 standard time zones on November 18, 1883, and jurisdiction for the zones was given to the Interstate Commerce Commission (ICC). Time Zones Being Used in Dependencies of United States Offset 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 United States Offset Note: Local time in these time zones changes when Daylight Saving Time begins and ends. In practice, this means that the local time in these time zones changes when DST begins and ends. For example, Eastern Time (ET) refers to Eastern Standard Time (EST) or Eastern Daylight Time (EDT), depending on which is currently in use. The time zones in the contiguous US are often referred to by their generic name, without making a difference between standard time and Daylight Saving Time designations. Generalized Time Zones in United States Time Zone Abbreviation & Name Since Howland Island and Baker Island constitute the world's westernmost landmasses in relation to the International Date Line, making them the last places on Earth where any date exists, they are sometimes assigned a theoretical 12th time zone called Anywhere on Earth (AoE). As neither Hawaii nor the 5 dependencies use Daylight Saving Time (DST), there are only 6 corresponding DST time zones. In addition, Alaska, Hawaii, and 5 US dependencies all have their own time zones. The contiguous US has 4 standard time zones. However, adding the time zones of 2 uninhabited US territories, Howland Island and Baker Island, brings the total count to 11 time zones. There are 9 time zones by law in the USA and its dependencies. Time Zones Currently Being Used in United States Offset Business Date to Date (exclude holidays).
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