![]() law they are:Ĭonnecticut, Delaware, District of Columbia, Georgia, Maine, Maryland, Massachusetts, New Hampshire, New Jersey, New York, North Carolina, Ohio, Pennsylvania, Rhode Island, South Carolina, Vermont, Virginia, West Virginia Partially: Florida, Indiana, Kentucky, Michigan, Tennessee No DST observed, not defined by 15 U.S.C. The United States of America and its surrounding areas use 9 standard time zones. Also, these abbreviations can be the same as those used in other parts of the world for different time zones. The shorter abbreviations we often use are just for convenience and are not official. The official names of the time zones are what's used in laws and official documents. Before this, they were based on the solar time at different longitudes west of Greenwich, UK. Since August 9, 2007, these time zones are defined by how many hours they are ahead of or behind Coordinated Universal Time (UTC). The Secretary of Transportation has the power to decide which time zones different regions will use and whether they'll follow daylight saving time. This law decides when daylight saving time starts and ends, if it's used. In the United States, standard time zones and the rules for daylight saving time are set by federal law (15 USC §260). United States Maps in our Store - Order High Resolution Vector and Raster Files It is the mix of the time zone and DST rules, along with the timekeeping services, which calculate the legal civil time for any United States location at any moment. The clocks managed by these services are kept in synchronization with each other as well as with those of other internationally recognized timekeeping organizations. Official and extremely precise timekeeping services (clocks) are presented by 2 federal agencies: NIST (the National Institute of Standards and Technology) (an agency of the Department of Commerce) and UNSO (the United States Naval Observatory). The time zone boundaries and daylight saving time observance are organized by the Department of Transportation. observing DST (daylight saving time) for generally the spring, summer, and fall months. To see more detail view our larger format world time zone map.Explore US time zone map, Time in the United States of America, by law, is divided into 9 standard time zones covering the American states, territories and other U.S. Time zones to the east of the Greenwich meridian are later and time zones to the west of the Greenwich meridian are earlier. The Greenwich meridian time zone is 7 1/2 degrees east and 7 1/2 degrees west of zero degrees longitude. This line runs through the United Kingdom, France, Spain, Algeria, Mali and Ghana in Africa. The time convention begins with Universal Coordinated Time (UTC) which is also commonly referred to as Greenwich Mean Time (GMT) being located at the Greenwich meridian. In theory time zones are based on the division of the world into twenty four time zones of 15 degrees longitude each. ![]() ![]() The world time zone map indicates the standard time zones actually observed. Most countries do not adjust their time zone observance and when they do it most likely involves small boundary changes or changes in the observance of daylight saving time. The world time zone map uses a repeating color scheme to designate the different standard time zones observed in each country. ![]()
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |