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About The World Clock

Detailed explanations

The main part of the World Clock is divided in three sections:

1. World Clock versions/continents/sorting

Here you can select among several selections of cities. Full will display a large list of cities/places known to the World Clock, the list is rather big, so it may take some time loading. Some cities not shown there, are still available through the Search engine. Standard is the most common used, it shows most big/important cities all over the World, trying to keep the number somewhat low, about 140 cities there. Then there is a number of continental versions, each showing all cities for a particular continent for more in-depth view of a continent, there is a version for Africa, North/Latin America, South America, Asia, Europe and Australia & Pacific Islands.

Then there are three different ways to sort the table, Alphabetically by city-name, Alphabetically by country or by increasing time. Just play with them:)

2. Main World Clock table

This part is the list of all the cities which are requested. If there is a star (*) after the city-name, this means that the city is known to observe Daylight Saving Time (DST) at the moment. The clock displayed has been advanced correctly(hopefully) according to this, so it should represent correct (DST) time there.

If the time shown has a '-' (minus) after the time, this means that the time refers to the previous day, that is the day before current UTC-time which is displayed below the table. So with a '-' (minus) the place is one day behind those without a minus.

If there is a '+' after the time, the place has already entered the day after current UTC-time, and is therefore one day ahead of those cities with no sign. Note that '+' and '-' is relative to current UTC-time, not your own local time.

3. Current UTC-time

This shows the UTC-time used for calculation of the World Clock table. UTC means Universal Time, Coordinated, and all the other cities are an offset added/subtracted to/from this, e.g. 5 hours ahead of UTC. The time shown here may be some seconds off real UTC-time, so you should consider other sources to get 100 % precise time to the second.

Time zones

Time zones are a way of organizing time so that people living in a large area (country, part of continent) share the same time, just to make things easy. People living at about the same longitude usually have about the same local time. There are 25 standard time zones around the world, these are all an integer offset of hours to UTC-time, for example, +5 hours or -10 hours to UTC. If UTC-time is 12:00 (Noon/PM), then people having offset +5 hours, have local time 17:00 (or 5:00 PM).

Then... there are some countries/places not using the standard time zones, they might be 5 hours and 45 minutes ahead of UTC, like Kathmandu is or some other non-integer offset of hours.

Daylight Saving Time (DST)

Cities with * after the name in World Clock are observing DST.

Fixed Time Clock

One Fixed Time Clock is available. Here you can select one city and some time in past or future and press the button, then the time all over the World at that moment will be displayed.

Meeting Planner

If you need to plan a meeting between people on different continents or just to make a call far away, the Meeting Planner will hopefully be helpful. Just select the cities you are interested in, and the day you want to hold the meeting to have the World Clock Meeting Planner display corresponding times for all those cities for that day.

Personal World Clock

You have the possibility to make your own Personal World Clock. Here you can select which cities you want to display, and save the configuration, then the Personal World Clock should "remember" which cities next time you visit the page. To make this work you'll need support for Cookies in your Web-browser, and they must be enabled as well.

Soon to come

More features will be available later - if you have any suggestions, please feel free to send them to webmaster@timeanddate.com

Background history

The World Clock was originally made in November 1995 and it has been very popular, with millions of page views on the old site. It was moved to timeanddate.com in May 1998. The World Clock was 10 years old in November 2005.

More information

Related links

Related time zone tools

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