Time zone abbreviations can be confusing, especially if you aren’t already familiar with the various time zones they represent. If you’re wondering about the abbreviation for Eastern Standard Time (EST) or need to know what UTC means, this handy guide will help.
Converting from UTC to AM/PM. For both standard and daylight saving time. Df col = yourseries col.dt.tzlocalize ('UTC') Now convert this series into the required timezone by series.dt.tzconvert df col = yourseries col.dt.tzconvert ('US/Eastern') The above method will take care of daylight savings time. If you want to check more timezones you can pip install pytz. Daylight Saving Time (DST) Not Observed in Year 2021. Daylight Saving Time has never been used here. Clocks do not change in UTC-5, Time Zone. There is no previous DST change in UTC-5.
UTC and GMT: The Prime Meridian
UTC stands for Coordinated Universal Time. This is the world’s standard for regulating clocks and referring to other time zones. Also known as Greenwich Mean Time or GMT, it represents 0° in longitude or the Prime Meridian. The following cities are on or near the Prime Meridian and use UTC or GMT for their time zones:
- London, United Kingdom
- Accra, Ghana
- Valencia, Spain
- Bordeaux, France
Every other time zone represents an adjustment from UTC or GMT in terms of hours before or after it using minus or plus symbols, respectively.
Common World Time Zone Abbreviations
The following list includes some of the most common time zone abbreviations used around the world. Since some countries have their own abbreviations and names for time zones, you’ll find that there’s some overlap between zones.
AEST - Australia Eastern Standard Time
War thunder playstation 4 controls. AEST stands for Australia Eastern Standard Time and is UTC +10:00. It’s in use in the eastern portion of Australia. Cities in this time zone include Brisbane and Sydney.
ACST - Australia Central Standard Time
ACST is the abbreviation for Australia Central Standard Time. ACST is UTC +09:30. This time zone represents the central portion of Australia, including the cities of Adelaide and Darwin.
AFT - Afghanistan Time
The country of Afghanistan uses the time zone of Afghanistan Time, which has the abbreviation AFT. This is UTC +04:30.
AKST - Alaska Standard Time
The abbreviation AKST stands for Alaska Standard Time. This time zone is in use in the state of Alaska and is UTC -09:00. During daylight savings time, it changes to AKDT for Alaska Daylight Time.
AST - Atlantic Standard Time
Atlantic Standard Time, abbreviated AST, is a time zone used by several countries. AST is UTC -04:00. During daylight savings time, this time zone is ADT or Atlantic Daylight Time. A few of the places using AST include the following:
- Antigua and Barbuda
- US Virgin Islands
AWST - Australia Western Standard Time
AWST stands for Australia Western Standard Time and is UTC +09:00. AWST is in use in the western portion of Australia, like in the city of Perth.
CAT - Central Africa Time
Central Africa Time is abbreviated as CAT. This time zone is UTC +02:00 and is in use in the following countries:
CET - Central European Time
Central European Time, abbreviated as CET, is used in a number of countries in Europe. It is UTC +01:00. In countries that observe daylight savings, the time zone changes to CEST for Central European Summer Time or CEDT for Central European Daylight Time. A few of the places using CET include the following:
CST - Central Standard Time
In use in the center portion of the United States and Canada, Central Standard Time is abbreviated CST. It is UTC -06:00. During daylight savings time, it changes to CDT or Central Daylight Time. This covers cities like Houston, Mexico City and Winnipeg.
EAT - East Africa Time
In the Eastern portion of Africa, several countries use EAT to abbreviate East Africa Time. EAT is UTC +03:00. It’s in use in the following places:
EET - Eastern European Time
EET is an abbreviation for Easter European Time. EET is UTC +02:00. In countries observing daylight savings time, it changes to EEDT for Eastern European Daylight Time or EEST for Eastern European Summer Time. Countries using EET include the following:
EST - Eastern Standard Time
Much of eastern North America uses EST to abbreviate Eastern Standard Time. This time zone is UTC -05:00. During daylight savings time, it changes to EDT for Eastern Daylight Time. Notable cities include New York, Toronto and Atlanta, as well as Nassau, Lima and Panama City.
MSK - Moscow Standard Time
MSK is the abbreviation for Moscow Standard Time. MSK is UTC +03:00. In summer, this becomes MSD or Moscow Summer Time. This time zone is in use in the following countries:
- Parts of Russia
- Parts of Ukraine
MST - Mountain Standard Time
Covering the central and some of the western portions of North America, Mountain Standard Time is abbreviated as MST. It is UTC -07:00. During daylight savings time, this becomes, MDT or Mountain Daylight Time. Cities here include Denver, Phoenix and Calgary.
PST - Pacific Standard Time
The western portion of North America is in PST or Pacific Standard Time. PST is UTC -08:00. It becomes PDT or Pacific Daylight Time during daylight savings time. Cities that observe PST include Vancouver, Los Angeles and Las Vegas.
WAT - West Africa Time
Many of the countries in West Africa use the time zone of West Africa Time. It is abbreviated as WAT. WAT is UTC +01:00. Some of the countries using West Africa Time include the following:
WET - Western European Time
WET is the abbreviation for Western European Time. This is UTC 00:00. During daylight savings time, it can be abbreviated as WEDT for Western European Daylight Time or WEST for Western European Summer Time. The following countries use WET:
- United Kingdom
DST - Daylight Savings Time
Many countries observe Daylight Saving Time, which has the abbreviation of DST. This is the practice of moving clocks one hour ahead in the spring to extend daylight hours during convenient times for workers.
Understanding Time Zones Helps You Communicate
When you’re communicating with people from other countries, it’s helpful to know a bit about the time zones, common abbreviations, and which countries are included. This is a small part of understanding other cultures.
|Eastern Time Zone|
|05:09, 7 May 2021 EST[refresh]|
06:09, 7 May 2021 EDT[refresh]
|Observance of DST|
|DST is observed in parts of this time zone.|
The Eastern Time Zone (ET) is a time zone encompassing part or all of 23 states in the eastern part of the United States, parts of eastern Canada, the state of Quintana Roo in Mexico, Panama and Colombia, mainland Ecuador, Peru, and a small portion of westernmost Brazil in South America, along with certain Caribbean and Atlantic islands.
Places that use:
- Eastern Standard Time (EST), when observing standard time (autumn/winter), are five hours behind Coordinated Universal Time (UTC−05:00).
- Eastern Daylight Time (EDT), when observing daylight saving time (spring/summer), are four hours behind Coordinated Universal Time (UTC−04:00 in March, at 2:00 a.m. EST, clocks are advanced to 3:00 a.m. EDT leaving a one-hour 'gap'. On the first Sunday in November, at 2:00 a.m. EDT, clocks are moved back to 1:00 a.m. EST, thus 'duplicating' one hour. Southern parts of the zone (Panama and the Caribbean) do not observe daylight saving time.
The largest city in the Eastern Time Zone is New York; the New York metropolitan area is the largest metropolitan area in the zone.
The boundaries of the Eastern Time Zone have moved westward since the Interstate Commerce Commission (ICC) took over time-zone management from railroads in 1938. For example, the easternmost and northernmost counties in Kentucky were added to the zone in the 1940s, and in 1961 most of the state went Eastern. In 2000, Wayne County, on the Tennessee border, switched from Central to Eastern.
In March 2018, the Florida Legislature passed a bill requesting authorization from Congress for year-round daylight saving time, which would effectively put Florida on Atlantic Standard Time year-round (except for west of the Apalachicola River, which would be on Eastern Standard Time year-round). A similar bill was proposed for the Canadian province of Ontario by its legislative assembly in late 2020, which would have a similar effect on the province if passed.
Daylight saving time
For those in the United States, daylight saving time for the Eastern Time Zone was introduced by the Uniform Time Act of 1966, which specified that daylight saving time would run from the last Sunday of April until the last Sunday in October. The act was amended to make the first Sunday in April the beginning of daylight saving time beginning in 1987.
Later, the Energy Policy Act of 2005 extended daylight saving time in the United States, beginning in 2007. Since then, local times change at 2:00 a.m. EST to 3:00 a.m. EDT on the second Sunday in March, and return from 2:00 a.m. EDT to 1:00 a.m. EST on the first Sunday in November. In Canada, daylight saving time begins and ends on the same days and at the same times as it does in the United States.
In Canada, the following provinces and territories are part of the Eastern Time Zone:
- Most of Ontario
- Most of Quebec
- Most of Nunavut
All observe daylight saving time in sync with the United States, with very localized exceptions.
The boundary between time zones is set forth in the Code of Federal Regulations, with the boundary between the Eastern and Central Time Zones being specifically detailed in 49 C.F.R. part 71.
Seventeen states and Washington, D.C. are located entirely within the Eastern Time Zone. They are:
Five states are partly in the Eastern Time Zone, with the remaining portions in the Central Time Zone. They are:
- Florida – peninsula and Big Bend regions east of the Apalachicola River along with portions of Gulf County south of the Intracoastal Waterway.
- Indiana – all except for northwest (Gary) and southwest (Evansville) regions
- Kentucky – eastern 60%, including the state's three largest metropolitan areas: Louisville, Lexington, Northern Kentucky
- Michigan – all, except for the four Upper Peninsula counties that border Wisconsin: Gogebic, Iron, Dickinson, and Menominee
- Tennessee – East Tennessee
Additionally, Phenix City, Alabama, and several nearby communities in Russell County, Alabama unofficially observe Eastern Time. This is due to their close proximity to Columbus, Georgia, which is on Eastern Time.
- Quintana Roo: This is the only Mexican state to observe EST. It moved from Central Time to Eastern Time after a successful lobbying effort by tourism interests. Quintana Roo does not observe daylight saving time.
The Bahamas and Haiti officially observe both Eastern Standard Time during the winter months and Eastern Daylight Time during the summer months. Cuba generally follows the U.S. with Eastern Standard Time in the winter, and Eastern Daylight Time in the summer, but the exact day of change varies year to year. Cayman Islands and Jamaica use Eastern Standard Time year-round.
Turks and Caicos Islands
The Turks and Caicos Islands followed Eastern Time with daylight saving until 2015, when the territory switched to the Atlantic Time Zone. The Turks and Caicos Islands switched back to the pre-2015 schedule in March 2018. A 2017 consultation paper highlighted the advantage for business and tourism of being in the same time zone as the eastern United States as an important factor in the decision.
In South America, the Brazilian states of Acre and the southwest part of Amazonas use Eastern Standard Time. In 2008, Brazil changed the zone of these regions to be closer to that of the Brazilian Capital; however, the change was unpopular and thus undone in 2013. Additionally, the countries of Panama, Colombia, Peru, and Ecuador (excluding the Galápagos Islands, which use Central Standard Time), also use Eastern Standard Time year-round.
- ^'Why Louisville?'. Louisville magazine. Archived from the original on 20 July 2018. Retrieved 10 February 2018.
- ^Klas, Mary Ellen (6 March 2018). 'Legislature approves year-round daylight saving time—but it's not a done deal yet'. Miami Herald. Retrieved 30 March 2018.
- ^Patton, Jessica (7 October 2020). 'Ontario MPP puts forward bill to make Daylight Saving Time standard time'. Global News. Retrieved 9 October 2020.
- ^ abcPrerau, David (2006). 'Early adoption and U.S. Law'. Daylight Saving Time. Web Exhibit. Retrieved 23 April 2007.
- ^Law, Gwillim (21 September 2007). 'United States Time Zones'.
- ^'Daylight Saving Time Starts Sunday'. Government of Ontario. 7 March 2008. Retrieved 21 September 2010.
- ^'Time zones and daylight saving time'. nrc.canada.ca. National Research Council Canada. 23 March 2019. Retrieved 7 March 2020.
- ^The specification for the Eastern Time Zone is set forth at 49 C.F.R. § 71.4, and is listed in text and PDF formats. The boundary between Eastern and Central is set forth at 49 C.F.R. § 71.5, and is listed in text and PDF formats.
- ^'On Mexican Time: Changing Time Zones To Accommodate Tourism'. Forbes. Retrieved 29 January 2015.
- ^'DST Dates Confirmed'. Timeanddate.com. 25 July 2017. Retrieved 10 January 2019.
- ^'Consultation paper Daylight Saving'(PDF). April 2017. pp. 6–7. Retrieved 10 January 2019.
- ^Every, Decree. 'Brazil Time Zones'. Retrieved 1 May 2021.
- ^President, Brazil'S. 'Brazil: Acre and parts of Amazonas switch time zones'. Retrieved 1 May 2021.
- ^'South America Time Zones'. Retrieved 1 May 2021.
Gmt Vs Utc Daylight Savings
Time zones in North America
|Time zone||Hours from UTC: Standard time||Hours from UTC: Daylight saving time|
|Hawaii–Aleutian (in Hawaii)||−10||−10|
|Hawaii–Aleutian (parts of Alaska)||−10||−9|
|Pacific (parts of Alaska)||−8||−8|
|Pacific (other states/provinces)||−8||−7|
|Mountain (Arizona, Sonora, Yukon, and Northeastern British Columbia only)||−7||−7|
|Mountain (other states/provinces)||−7||−6|
|Central (other states/provinces)||−6||−5|
|Eastern (parts of Nunavut, Ontario, and the Caribbean)||−5||−5|
|Eastern (other states/provinces)||−5||−4|
|Atlantic (Natashquan River)||−4||−4|
|Atlantic (other states/provinces)||−4||−3|
|Saint Pierre and Miquelon|
and most of Greenland