Mrthdrb

I have used Magento 1.9 initially timezone was America/Los_Angeles in app/etc/config.xml file and set India/Calcutta timezone in

System -> Configuration -> General -> Locale Options ->Timezone

at that time Magento function Mage::getModel('core/date')->date('Y-m-d H:i:s') return correct date.

But order placed time was -5:30 to real time.

For set Asia/Calcutta timezone, I have changed app/etc/config.xml general->locale->timezone to Asia/Calcutta and in app/Mage.php I have changed UTC to Asia/Calcutta,

And it has changed the timezone in the backend, it means order placed time is correct as real-time but the function Mage::getModel('core/date')->date('Y-m-d H:i:s') return me +5:30 time to real time.

Is there any place where I missed to change?

Or Is there another method to change the timezone of the Magento store?

You can set timezone from Admin panel ,

Go to :

System => Configuration => General => Locale Options =>Timezone

AND

Change the default timezon in file app/Mage.php

date_default_timezone_set('UTC');

Replace above line with following

date_default_timezone_set('Asia/Calcutta');

AND

Copy file app/code/core/Mage/Core/Model/Locale.php to app/code/local/Mage/Core/Model/Locale.php then find line 38

const DEFAULT_TIMEZONE = 'UTC';

Replace above line with following

const DEFAULT_TIMEZONE = 'Asia/Calcutta';

Note: If still it will not work. Dig in to following function in app/code/local/Mage/Core/Model/Locale.php.

public function storeDate($store=null, $date=null, $includeTime=false, $format = null)
 
 $timezone = Mage::app()->getStore($store)->getConfig(self::XML_PATH_DEFAULT_TIMEZONE);
 $date = new Zend_Date($date, $format, $this->getLocale());
 $date->setTimezone($timezone);
 if (!$includeTime) 
 $date->setHour(0)
 ->setMinute(0)
 ->setSecond(0);
 
 return $date;
 

Hope this helps

you have to set your timezone manually

first go to

app/etc/config.xml add your time zone here

<general>
 <locale>
 <code>en_US</code>
 <timezone>Asia/Calcutta</timezone>
 </locale>
 </general>

second go to app/Mage.php

on line 768

change this line too

date_default_timezone_set('UTC');

to your timezone

date_default_timezone_set('Asia/Calcutta');

Your locale settings are defined in the configuration under System => Configuration => General => Locale Options =>Timezone, and can be set per website scope.

You can quickly get/change in your core_config_data table (SELECT * FROM core_config_data WHERE path = 'general/locale/timezone';).

You might use Mage::getModel('core/date') for getting current time and date.

Getting formatted date based on locale settings:

echo Mage::getModel('core/date')->date('d/m/Y H:i:s');
# return 22/10/2017 23:30:21

echo Mage::getModel('core/date')->timestamp();
# return current timestamp

echo date('d/m/Y H:i:s', Mage::getSingleton('core/date')->gmtTimestamp());
# returo current date in GMT timezone, doesn't matter your locale settings

See app/code/core/Mage/Core/Model/Date.php for a complete list of methods available.

My suggestion is: try to convert everything to GMT using this model's GMT methods, and stop worrying about php.ini, magento XML, and so on.