Because some countries, islands and states do not want to be divided into several zones, the zones' boundaries tend to wander considerably from straight north-south lines. Daylight Saving Time Future Clock Changes (Worldwide) Time Zone Africa / Casablanca Sunday, March 10, 2024. The international dateline was drawn to generally follow the 180 meridian in the Pacific Ocean. World Time and Time Zone Converter: Calculate the time difference between two time zones of the world. The 24 standard meridians, every 15 east and west of 0 at Greenwich, England, were designated the centers of the zones. GMT (Greenwich Mean Time) Vancouver (Canada) San Francisco (United States) Seattle (United States) February 28, 2024. C., applied the same procedure to zones all around the world. Find The Current Local Time And Date (Adjusted from GMT) Check the current local time in over 100 cities with our World Clock. Provides time zone conversions taking into account Daylight Saving Time (DST), local time zone and accepts present, past, or future dates. Find the exact time difference with the Time Zone Converter Time Difference Calculator which converts the time difference between places and time zones all over the world. Time Zone Converter Time Difference Calculator. On November 1, 1884, the International Meridian Conference in Washington, D. Get the time at any given coordinate on Earth, calculate time zone conversions. At noon, on November 18, 1883, telegraph lines transmitted GMT time to major cities where authorities adjusted their clocks to their zone's proper time. That year, the United States was divided into four time zones roughly centered on the 75th, 90th, 105th, and 120th meridians. Until 1883 most railway companies relied on some 100 different, but consistent, time zones. The problem of keeping track of over 300 local times was overcome by establishing railroad time zones. Until the 1860s most cities relied upon their own local “sun” time, but this time changed by approximately one minute for every 12 miles traveled east or west. Daylight Saving Time (DST) World Time Zone List. What Is Atlantic Standard Time Atlantic Standard Time (AST) is an eastern time zone in North America. This time zone is in use during standard time in: North America, Atlantic, Caribbean. Time zones did not become necessary in the United States until trains made it possible to travel hundreds of miles in a day. Atlantic Standard Time (AST) is 4 hours behind Coordinated Universal Time (UTC). Source: National Institute of Standards and Technology Physics Laboratory
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