Web Search results for time zones - 4,710,000
The World Clock shows current local
time in cities and countries, in all
time zones.
www.timeanddate.comInformation about the
time zone abbreviations and acronyms worldwide.
www.timeanddate.comTime and World
Time Zones and
time map with current
time around the World and countries operating Daylight Savings
Time sunclock map shows what part of the
...www.worldtimezone.com
The official US
time. Public service cooperatively provided by the two
time agencies of
... Please Click. Select a
time zone.
Zone-00.
Time Zone Names
...www.time.govMay 11, 2007
... A
time zone is a region of the earth that has uniform standard
time, usually referred to as the local
time. By convention
time zones compute
...en.wikipedia.orgZebraMap Get your own free customizable
time zone map for your web site or just for your own use. Julie Satinover - fine artist
...www.timezonecheck.comWe were working on a project for international travelers and needed
time zone data to complete the job. We expected it to be easy -- surely someone,
...www.worldtimeserver.comFeb 27, 2008
... High resolution versions of the world
time zone map by HM Nautical Almanac Office.
aa.usno.navy.mil
Wikipedia
Time zone
From Wikipedia, the free encyclopedia
(Redirected from Time zones)
"Timezone" and "TimeZone" redirect here. For other uses, see Time zone (disambiguation).
For detailed information on all time zones, see List of time zones.
A time zone is a region of the Earth that has adopted the same standard time, usually referred to as the local time. Most adjacent time zones are exactly one hour apart, and by convention compute their local time as an offset from UTC (see also Greenwich Mean Time).
Standard time zones can be defined by geometrically subdividing the Earth's spheroid into 24 lunes (wedge-shaped sections), bordered by meridians each 15° of longitude apart. The local time in neighbouring zones would differ by one hour. However, political and geographical practicalities can result in irregularly-shaped zones that follow political boundaries or that change their time seasonally (as with daylight saving time), as well as being subject to occasional redefinition as political conditions change.
Before the adoption of time zones, people used local solar time (originally apparent solar time, as with a sundial; and, later, mean solar time). Mean solar time is the average over a year of apparent solar time. Its difference from apparent solar time is the equation of time.
This became increasingly awkward as railways and telecommunications improved, because clocks differed between places by an amount corresponding to the difference in their geographical longitude, which was usually not a convenient number. This problem could be solved by synchronizing the clocks in all localities, but then in many places the local time would differ markedly from the solar time to which people are accustomed. Time zones are thus a compromise, relaxing the complex geographic dependence while still allowing local time to approximate the mean solar time. There has been a general trend to push the boundaries of time zones further west of their designated meridians in order to create a permanent daylight saving time effect. The increase in worldwide communication has further increased the need for interacting parties to communicate mutually comprehensible time references to one another.
Find more time zones info on Wikipedia
