Articles About Time Zone (21)
![Illustration image](http://webcf.waybackmachine.org/web/20210427042926im_/https://c.tadst.com/gfx/150x84/utc-prime-meridian-.jpg?1)
UTC – The World's Time Standard
Coordinated Universal Time (UTC) is the basis for civil time today. This 24-hour time standard is kept using highly precise atomic clocks combined with the Earth's rotation.
![Illustration image](http://webcf.waybackmachine.org/web/20210427042926im_/https://c.tadst.com/gfx/150x84/observatory-greenwich.jpg?1)
UTC & GMT – Same Difference?
Greenwich Mean Time (GMT) is often interchanged or confused with Coordinated Universal Time (UTC). But GMT is a time zone and UTC is a time standard.
![Greenwich Observatory Illustration image](http://webcf.waybackmachine.org/web/20210427042926im_/https://c.tadst.com/gfx/150x84/greenwich-observatory01.jpg?1)
GMT or BST in the UK?
The UK is not on Greenwich Mean Time (GMT) all year. During Daylight Saving Time the correct time zone is British Summer Time (BST).
![Skyline of downtown Indianapolis, Indiana, USA.](http://webcf.waybackmachine.org/web/20210427042926im_/https://c.tadst.com/gfx/150x84/indianapolis-time-zone-usa.jpg?1)
Time Zones in Indiana
In Indiana, USA, there are are two time zones: Central Time and Eastern Time. All counties set their clocks one hour to and from Daylight Saving Time (DST) twice a year. Indiana time zone map with local time in each county.
![Fifth Avenue Clock in front of the Flatiron Building in New York City. Fifth Avenue Clock with the Flatiron Building at the background in New York City.](http://webcf.waybackmachine.org/web/20210427042926im_/https://c.tadst.com/gfx/150x84/fifth-avenue-new-york-clock-night.jpg?1)
What Is Standard Time?
Standard time is also known as winter time or normal time in some countries.
![Time Zone map showing the International Date Line.](http://webcf.waybackmachine.org/web/20210427042926im_/https://c.tadst.com/gfx/150x84/international-date-line.jpg?1)
What Is the International Date Line (IDL)?
The International Date Line (IDL) is an imaginary line on Earth's surface located at about 180 degrees east (or west) of the Greenwich Meridian.
![World map with time zones indicated in different colors](http://webcf.waybackmachine.org/web/20210427042926im_/https://c.tadst.com/gfx/150x84/timezone-map-all-incusive.png?1)
What Is a Time Zone?
A time zone refers to any region where the same standard time is kept. Interactive Time Zone Map for current time zones worldwide.
![Map showing DST areas for Navajo in Arizona.](http://webcf.waybackmachine.org/web/20210427042926im_/https://c.tadst.com/gfx/150x84/tz-map-arizona-2048x1365.png?1)
No DST in Most of Arizona
Most of the US state of Arizona does not use Daylight Saving Time (DST). The exception is the Navajo Nation.
![A map of time zones and DST in Europe.](http://webcf.waybackmachine.org/web/20210427042926im_/https://c.tadst.com/gfx/150x84/tzmap-europe-2014.png?1)
Daylight Saving Time and Time Zones in Europe
When does Daylight Saving Time start and end in Europe? How many time zones are there?
![Illustration image](http://webcf.waybackmachine.org/web/20210427042926im_/https://c.tadst.com/gfx/150x84/longitude-and-latitude-simple.png?2)
What Are Longitudes and Latitudes?
Cartographers and geographers divide the Earth into longitudes and latitudes in order to locate points on the globe.
![Time Zones in Australia and New Zealand.](http://webcf.waybackmachine.org/web/20210427042926im_/https://c.tadst.com/gfx/150x84/tzmap-australia-nz.png?1)
Australia's Time Zones
Australia has multiple time zones. Some of them are half-hour and quarter-hour time zones. Not all states and territories use Daylight Saving Time (DST).
![Illustration image](http://webcf.waybackmachine.org/web/20210427042926im_/https://c.tadst.com/gfx/150x84/special-tz-map6.png?1)
Half Hour and 45-Minute Time Zones
While most time zones differ from Coordinated Universal Time (UTC) by a number of full hours, some time zones have 30-minute or 45-minute offsets.
![Illustration image](http://webcf.waybackmachine.org/web/20210427042926im_/https://c.tadst.com/gfx/150x84/time-zone-map-history.jpg?1)
Why Do We Have Time Zones?
The expansion of transport and communication during the 19th century created a need for a unified time-keeping system, and time zones were introduced.
![The Shepherd Gate Clock on the wall at the Royal Observatory Greenwich.](http://webcf.waybackmachine.org/web/20210427042926im_/https://c.tadst.com/gfx/150x84/sheperd-gate-clock-uk1.jpg?1)
UK Time Zone History
The United Kingdom started using Greenwich Mean Time (GMT) as its standard time in 1880. It remained the base of civil time in the world until 1972.
![Radio telescopes of the Very Large Array in New Mexico, USA.](http://webcf.waybackmachine.org/web/20210427042926im_/https://c.tadst.com/gfx/150x84/very-large-array.jpg?1)
What Is Universal Time?
Universal Time is a solar time standard used in astronomy and to define time on Earth. How is it measured? What's the difference between UT, UT0, UT1, UT2, and UTC?
![UTC Vs. CUT](http://webcf.waybackmachine.org/web/20210427042926im_/https://c.tadst.com/gfx/150x84/utc-cut-debate.png?1)
Why UTC – not CUT?
The abbreviation for Coordinated Universal Time is UTC. Why is it not abbreviated as “CUT” or “TUC”?
![Illustration image](http://webcf.waybackmachine.org/web/20210427042926im_/https://c.tadst.com/gfx/150x84/internet-time--illustration.png?1)
Internet Time
What is Internet Time, and how to convert between the time zones and beats.
![Canada’s Time Zones](http://webcf.waybackmachine.org/web/20210427042926im_/https://c.tadst.com/gfx/150x84/ca-1452952800-large.png?1)
Canada’s Time Zones
timeanddate.com provides information on Canada’s time zones.
![Interactive Timezone Map from timeanddate.com Interactive Timezone Map from timeanddate.com](http://webcf.waybackmachine.org/web/20210427042926im_/https://c.tadst.com/gfx/150x84/timezone-map5.png?1)
What Is a Time Zone?
The term time zone can be used to describe several different things.
![Fireworks illuminate a river in Japan. Fireworks illuminate a river in Japan.](http://webcf.waybackmachine.org/web/20210427042926im_/https://c.tadst.com/gfx/150x84/fireworks-city-newsletter.jpg?1)
38 New Years in 2022
Toast the New Year 38 times with our new year countdown. 26 hours after the first bottle pops on Kiritimati in the Pacific, Baker Island greets the New Year.
![European Parliament building at sunset. Brussels, Belgium.](http://webcf.waybackmachine.org/web/20210427042926im_/https://c.tadst.com/gfx/150x84/eu-parliament.jpg?1)
The Sun is Setting on DST in the EU
The European Parliament wants to remove Daylight Saving Time (DST) in the European Union. What does that mean for the countries in Europe? And what about Brexit?