It was created by Congress in response to this nation’s growing population. Pacific Standard Time (PST) is an official time zone for most of North America, South America, and Australia. PST is a relatively new time zone that will replace the former time zones in 2020. This zone includes most of North America, South America, and Australia. The Pacific Time Zone is an area of the world based on time zones and daylight saving time schedules. Roosevelt’s authority to make daylight saving time uniform throughout the nation. It was implemented across all states of the US on 7 March 1941 under President Franklin D. The US government recognized MST in 1918 with Alaska and Hawaii coming on board later that year. MST was first used in 1907 when it was adopted by Colorado, Montana, Utah, and Wyoming. It is the same time as Pacific Standard Time (PST) during the summer months and Mountain Daylight Time (MDT) during the winter months. Mountain Standard Time is a time zone that serves the mountain states of the United States. ![]() The first city to switch to Central Standard Time was Chicago, which had previously been using local standard time since 1847.Ĭentral Standard Time is also referred to as “Zulu” or Z (which stands for Zero-zero). The idea emerged during the American Civil War when many people started to use railroad schedules as their primary means of estimating time, leading to confusion among businesses and travelers. Central Standard Time replaced the practice of each state setting their own time, which was known as “local standard time.” Arthur in the United States and by President Díaz in Mexico. It is 5 hours ahead of Greenwich Mean Time.Ĭentral Standard Time was established in 1885 by a law signed by President Chester A. What Is Central Standard Time (CST)?Ĭentral Standard Time is the time standard used for most of North America and most of Mexico. This act was signed into law by President Lyndon B Johnson and took effect one year later on July 1st, 1967 at 2:00 PM local time during DST in Washington D.C. It can be expressed in terms of either daylight saving time or standard time.Įastern Standard Time was established as the legal standard for civil observance in the United States by Act No. Eastern Daylight Time (EDT) is five hours ahead of UTC while most of the time zones around the world are on different times.Įastern Standard Time does not follow a particular standard, and it does not have a uniform definition across countries. What Is Eastern Standard Time (EST)?Įastern Standard Time (EST) is a time zone that is six hours ahead of UTC. He needed to keep track of the passage of trains on his railroad over a 24-hour period to determine how many trains should leave each station and arrive on schedule for passengers waiting at each stop along the line. The first accurate time scale in America was created in 1884 by a railroad engineer named Leland Stanford Jr. The other 4 zones are Hawaii, Alaska, and Arizona. In the contiguous United States, there are 3 time zones: Eastern, Central, and Mountain. This means that it does not use daylight saving time like other zones.Īll of the time zones on the US mainland are offset from one another by 15 degrees. The Eastern time zone is also referred to as Eastern Standard Time and it is one hour ahead of UTC. However, there are actually six time zones in the United States: EST, CST, MST, PST, Alaska-Hawaii Daylight Time (AKDT), and Chukchi Daylight Time (CDT). Many people think that there are only four zones in the country: Eastern Standard Time (EST), Central Standard Time (CST), Mountain Standard Time (MST), and Pacific Standard Time (PST). It includes all of Canada, most of Mexico, the Caribbean, and Central America. ![]() ![]() The Eastern time zone is the most populous time zone in the United States. The United States has 6 (six) time zones.
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