$TimeZone

$TimeZone

gives the current time zone to assume for dates and times.

Details

  • $TimeZone gives the default time zone used by date functions.
  • Possible timezone specifications include:
  • nnumber of hours added to GMT
    "zone"named time zone
    Entity["TimeZone", "zone"]time zone specified by the "TimeZone" entity
    loctime zone associated with the given location
    Automaticautomatically determine the time zone
    Nonespecify no time zone information
  • For numeric values n, the value represents the number of hours that must be added to Greenwich Mean Time (GMT) to obtain local time.
  • For string specifications "zone", the result will be returned in the associated named time zone.
  • Example time zone strings include "America/Chicago", "Europe/London", "Asia/Tokyo" and "Zulu".
  • A list of available time zone entities can be found using EntityList["TimeZone"].
  • For location specifications loc, the time zone associated with the specified location Entity or GeoPosition will be used.
  • $TimeZone defaults to $SystemTimeZone.
  • $TimeZone=z resets the current time zone for purposes of functions like DateString, DateList, and AbsoluteTime.

Examples

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Basic Examples  (1)

Show the number of hours that must be added to GMT to obtain local time:

Possible Issues  (1)

$TimeZone is set to the current GMT offset when the Wolfram System is initialized:

If the session persists across a daylight time transition, the offset will not change automatically:

In such cases, $TimeZone may be reset manually, or a named time zone may be used to account for the change:

Wolfram Research (2007), $TimeZone, Wolfram Language function, https://reference.wolfram.com/language/ref/$TimeZone.html (updated 2022).

Text

Wolfram Research (2007), $TimeZone, Wolfram Language function, https://reference.wolfram.com/language/ref/$TimeZone.html (updated 2022).

CMS

Wolfram Language. 2007. "$TimeZone." Wolfram Language & System Documentation Center. Wolfram Research. Last Modified 2022. https://reference.wolfram.com/language/ref/$TimeZone.html.

APA

Wolfram Language. (2007). $TimeZone. Wolfram Language & System Documentation Center. Retrieved from https://reference.wolfram.com/language/ref/$TimeZone.html

BibTeX

@misc{reference.wolfram_2023_$timezone, author="Wolfram Research", title="{$TimeZone}", year="2022", howpublished="\url{https://reference.wolfram.com/language/ref/$TimeZone.html}", note=[Accessed: 07-December-2023 ]}

BibLaTeX

@online{reference.wolfram_2023_$timezone, organization={Wolfram Research}, title={$TimeZone}, year={2022}, url={https://reference.wolfram.com/language/ref/$TimeZone.html}, note=[Accessed: 07-December-2023 ]}