From 5fd83771641d15c418f747bd343ba6738d3875f7 Mon Sep 17 00:00:00 2001 From: Cameron Katri Date: Sun, 9 May 2021 14:20:58 -0400 Subject: Import macOS userland adv_cmds-176 basic_cmds-55 bootstrap_cmds-116.100.1 developer_cmds-66 diskdev_cmds-667.40.1 doc_cmds-53.60.1 file_cmds-321.40.3 mail_cmds-35 misc_cmds-34 network_cmds-606.40.1 patch_cmds-17 remote_cmds-63 shell_cmds-216.60.1 system_cmds-880.60.2 text_cmds-106 --- system_cmds/zic.tproj/tz-link.htm | 443 ++++++++++++++++++++++++++++++++++++++ 1 file changed, 443 insertions(+) create mode 100644 system_cmds/zic.tproj/tz-link.htm (limited to 'system_cmds/zic.tproj/tz-link.htm') diff --git a/system_cmds/zic.tproj/tz-link.htm b/system_cmds/zic.tproj/tz-link.htm new file mode 100644 index 0000000..0e63073 --- /dev/null +++ b/system_cmds/zic.tproj/tz-link.htm @@ -0,0 +1,443 @@ + + + + +Sources for Time Zone and Daylight Saving Time Data + + + + + + + + + + +

Sources for Time Zone and Daylight Saving Time Data

+
+@(#)tz-link.htm 7.42 +
+

+Please send corrections to this web page to the +time zone mailing list. +

+

The tz database

+

+The public-domain time zone database contains code and data +that represent the history of local time +for many representative locations around the globe. +It is updated periodically to reflect changes made by political bodies +to UTC offsets and daylight-saving rules. +This database (often called tz or zoneinfo) +is used by several implementations, +including +the GNU C Library used in +GNU/Linux, +FreeBSD, +NetBSD, +OpenBSD, +Cygwin, +DJGPP, +HP-UX, +IRIX, +Mac OS X, +OpenVMS, +Solaris, +Tru64, and +UnixWare.

+

+Each location in the database represents a national region where all +clocks keeping local time have agreed since 1970. +Locations are identified by continent or ocean and then by the name of +the location, which is typically the largest city within the region. +For example, America/New_York +represents most of the US eastern time zone; +America/Indianapolis represents most of Indiana, which +uses eastern time without daylight saving time (DST); +America/Detroit represents most of Michigan, which uses +eastern time but with different DST rules in 1975; +and other entries represent smaller regions like Starke County, +Kentucky, which switched from central to eastern time in 1991. +To use the database, set the TZ environment variable to +the location's full name, e.g., TZ="America/New_York".

+

+In the tz database's +FTP distribution, +the code is in the file tzcodeC.tar.gz, +where C is the code's version; +similarly, the data are in tzdataD.tar.gz, +where D is the data's version. +The following shell commands download +these files to a GNU/Linux or similar host; see the downloaded +README file for what to do next.

+
wget 'ftp://elsie.nci.nih.gov/pub/tz*.tar.gz'
+gzip -dc tzcode*.tar.gz | tar -xf -
+gzip -dc tzdata*.tar.gz | tar -xf -
+
+

+The code lets you compile the tz source files into +machine-readable binary files, one for each location. It also lets +you read a tz binary file and interpret time stamps for that +location.

+

+The data are by no means authoritative. If you find errors, please +send changes to the time zone +mailing list. You can also subscribe to the +mailing list, retrieve the archive of old +messages (in gzip compressed format), or retrieve archived older versions of code +and data.

+

+The Web has several other sources for time zone and daylight saving time data. +Here are some recent links that may be of interest. +

+

Web pages using recent versions of the tz database

+ +

Other time zone database formats

+ +

Other tz compilers

+ +

Other tz binary file readers

+ +

Other tz-based time zone conversion software

+ +

Other time zone databases

+ +

Maps

+ +

Time zone boundaries

+ +

Civil time concepts and history

+ +

National histories of legal time

+
+
Australia
+
The Community Relations Division of the New South Wales (NSW) +Attorney General's Department maintains a history of +daylight saving in NSW.
+
Austria
+
The Federal Office of Metrology and Surveying publishes a +table of daylight saving time in Austria (in German).
+
Belgium
+
The Royal Observatory of Belgium maintains a table of time in Belgium (in Dutch).
+
Brazil
+
The Time Service Department of the National Observatory +records Brazil's daylight saving time decrees (in +Portuguese).
+
Canada
+
The Institute for National Measurement Standards publishes current +and some older information about Time +Zones and Daylight Saving Time.
+
Chile
+
WebExhibits publishes a history of official time (in Spanish) originally +written by the Chilean Hydrographic and Oceanographic Service.
+
Germany
+
The National Institute for Science and Technology maintains the Realisation of +Legal Time in Germany.
+
Israel
+
The Interior Ministry periodically issues announcements (in Hebrew).
+
Mexico
+
The Investigation and Analysis Service of the Mexican Library of +Congress has published a history of Mexican local time (in Spanish).
+
Malaysia
+
See Singapore below.
+
Netherlands
+
Legal time in the Netherlands (in Dutch) +covers the history of local time in the Netherlands from ancient times.
+
New Zealand
+
The Department of Internal Affairs maintains a brief history about +daylight saving. The privately-maintained Time Changes in +New Zealand has more details.
+
Singapore
+
Why +is Singapore in the "Wrong" Time Zone? details the +history of legal time in Singapore and Malaysia.
+
United Kingdom
+
History of +legal time in Britain discusses in detail the country +with perhaps the best-documented history of clock adjustments. +The National Physical Laboratory also maintains an archive +of summer time dates.
+
+

Precision timekeeping

+ +

Time notation

+ +

Related indexes

+ + + -- cgit v1.2.3-56-ge451