JavaScript date_default_timezone_set

Sets the default timezone used by all date/time functions in a script

function date_default_timezone_set (tz) {
    // Sets the default timezone used by all date/time functions in a script  
    // 
    // version: 1109.2015
    // discuss at: http://phpjs.org/functions/date_default_timezone_set    // +   original by: Brett Zamir (http://brett-zamir.me)
    // -    depends on: timezone_abbreviations_list
    // %        note 1: Uses global: php_js to store the default timezone
    // *     example 1: date_default_timezone_set('unknown');
    // *     returns 1: 'unknown'    var tal = {},
        abbr = '',
        i = 0;
 
    // BEGIN REDUNDANT    this.php_js = this.php_js || {};
    // END REDUNDANT
    // PHP verifies that the timezone is valid and also sets this.php_js.currentTimezoneOffset and this.php_js.currentTimezoneDST if so
    tal = this.timezone_abbreviations_list();
    for (abbr in tal) {        for (i = 0; i < tal[abbr].length; i++) {
            if (tal[abbr][i].timezone_id === tz) {
                this.php_js.default_timezone = tz;
                return true;
            }        }
    }
    return false;
}

external links: original PHP docs | raw js source

Examples

Running

1	date_default_timezone_set('unknown');

Should return

'unknown'

Dependencies

In order to use this function, you also need:

timezone_abbreviations_list

Open syntax issues

php.js uses JsLint to help us keep our code consistent and prevent some common bugs.

Eventually we want all code to pass or at least take into consideration most fixes suggested by JsLint, following this JsLint configuration we’ve decided on.

Authors

Thanks to the following developers, you get to have date_default_timezone_set goodness in JavaScript.

Brett Zamir ( original )

Comments

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Use:

[CODE]
your_stuff('here');
[/CODE]

for proper code formatting
By submitting code here you are allowing us to use it in php.js hence dual licensing it under the MIT and GPL licenses

Alberto Basso
7 Dec '11

The function date_default_timezone_set(), but I've found all functions that use timezone_abbreviations_list() returns always: "InternalError: too much recursion".
Tested on Firefox 3.6.24, but also on more recent version 7.0.1.

Thanks very much for your work!
Bye!

Brett Zamir
20 Jul '11

@Alberto Ruiz: You really should try posting in a help forum like StackOverflow (tagged with "PHP"), as this page is just about our JavaScript implementation. Try using "var_dump" instead of "echo" to ensure that the string is of the right length and not containing extra characters or something.

Alberto Ruiz
13 Jul '11

Can you pass a variable into date_default_timezone_set()?

$myTimeZONEvar=$_SESSION['setting_timezone_session']; // I saved 'America/New_York' into a session
echo $myTimeZONEvar; // This shows that the variable is exactly 'America/New_York'
date_default_timezone_set($myTimeZONEvar); // I get an error everytime I try to run this...but if I remove the variable and put in the string 'America/New_York'
....then it works.

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JavaScript date_default_timezone_set

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