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Top Forums Shell Programming and Scripting How to configure time zone using POSIX format in Centos 5? Post 302746471 by DGPickett on Wednesday 19th of December 2012 12:15:22 PM
Old 12-19-2012
PERL has an embedded db that might help: cgi - Get time zone abbreviation using POSIX (Perl) - Stack Overflow

The Olson DB escribed: tz database - Wikipedia, the free encyclopedia

Noe GMT-14 is UTC + 14 hours is UTC - 10 hours is, according to the database:
List of tz database time zones - Wikipedia, the free encyclopedia
it is HST, so you would set TZ to HTC-10 or something like that. POSIX offset sign is backward of TZ: GMT/UTC standards reversed in timezone standards (and PHP, and wordpress, and Unix/Posix) | Stef's Blog

Of course, you might be off a day!
Code:
$ ( echo $TZ ; date ; TZ=GMT-14 ; date )
EST5EDT
Wed Dec 19 12:19:32 EST 2012
Thu Dec 20 07:19:32 GMT 2012
$ ( echo $TZ ; date ; TZ=GMT+14 ; date )
EST5EDT
Wed Dec 19 12:20:14 EST 2012
Wed Dec 19 03:20:14 GMT 2012
$ ( echo $TZ ; date ; TZ=GMT14 ; date )
EST5EDT
Wed Dec 19 12:21:18 EST 2012
Wed Dec 19 03:21:18 GMT 2012
$ ( echo $TZ ; date ; TZ=Pacific/Kiritimati ; date )
EST5EDT
Wed Dec 19 12:26:52 EST 2012
Wed Dec 19 17:26:52 Pacific/Kiritimati 2012
$ ( echo $TZ ; date ; TZ=Pacific/Kiritimati-14 ; date )
EST5EDT
Wed Dec 19 12:27:50 EST 2012
Thu Dec 20 07:27:50 Pacific/Kiritimati 2012
$

So, TZ sets the visible name, for which there should be a table of 3 place capital letter codes for every offset, but apparently there is not. Using more than 3 places may work some places.

Last edited by DGPickett; 12-19-2012 at 01:30 PM..
 

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DATETIME.SETTIMEZONE(3) 						 1						   DATETIME.SETTIMEZONE(3)

DateTime::setTimezone - Sets the time zone for the DateTime object

       Object oriented style

SYNOPSIS
public DateTime DateTime::setTimezone (DateTimeZone $timezone) DESCRIPTION
Procedural style DateTime date_timezone_set (DateTime $object, DateTimeZone $timezone) Sets a new timezone for a DateTime object. PARAMETERS
o $object -Procedural style only: A DateTime object returned by date_create(3). The function modifies this object. o $timezone - A DateTimeZone object representing the desired time zone. RETURN VALUES
Returns the DateTime object for method chaining or FALSE on failure. CHANGELOG
+--------+---------------------------------------------------+ |Version | | | | | | | Description | | | | +--------+---------------------------------------------------+ | 5.3.0 | | | | | | | Changed the return value on success from NULL to | | | DateTime. | | | | +--------+---------------------------------------------------+ EXAMPLES
Example #1 DateTime.setTimeZone(3) example Object oriented style <?php $date = new DateTime('2000-01-01', new DateTimeZone('Pacific/Nauru')); echo $date->format('Y-m-d H:i:sP') . " "; $date->setTimezone(new DateTimeZone('Pacific/Chatham')); echo $date->format('Y-m-d H:i:sP') . " "; ?> Procedural style <?php $date = date_create('2000-01-01', timezone_open('Pacific/Nauru')); echo date_format($date, 'Y-m-d H:i:sP') . " "; date_timezone_set($date, timezone_open('Pacific/Chatham')); echo date_format($date, 'Y-m-d H:i:sP') . " "; ?> The above examples will output: 2000-01-01 00:00:00+12:00 2000-01-01 01:45:00+13:45 SEE ALSO
DateTime.getTimezone(3), DateTimeZone.__construct(3). PHP Documentation Group DATETIME.SETTIMEZONE(3)
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