Magento – Magento 2 : How to change default date format every where in magento

I have had similar issue with Date filter :)

The way date time instantiated in the form like that

Step 1:-

In Block Form class Mage_CatalogSearch_Block_Advanced_Form

public function getDateInput($attribute, $part = 'from')
{
    $name = $attribute->getAttributeCode() . '[' . $part . ']';
    $value = $this->getAttributeValue($attribute, $part);

    return $this->_getDateBlock()
        ->setName($name)
        ->setId($attribute->getAttributeCode() . ($part == 'from' ? '' : '_' . $part))
        ->setTitle($this->getAttributeLabel($attribute))
        ->setValue($value)
        ->setImage($this->getSkinUrl('images/calendar.gif'))
        ->setFormat('%m/%d/%y') //So you need change the Format here !!!!!
        ->setClass('input-text')
        ->getHtml();
}

So you need to change the Date format for the calendar in the line ->setFormat('%m/%d/%y')

! Take look about the supported datetime format here http://www.dynarch.com/jscal/#sec34

Then its used in the method below to generate the block

$block = $this->getLayout()->createBlock('core/html_date');
$this->setData('_select_block', $block);

and in that block class Mage_Core_Block_Html_Date

Line 40: $displayFormat = Varien_Date::convertZendToStrFtime($this->getFormat(), true, (bool)$this->getTime());
.......
Line53: ifFormat    : "' . $displayFormat . '",

Step 2:-

In the advanced search collection class Mage_CatalogSearch_Model_Resource_Advanced_Collection

You need to modify this method to allow the new locale or the new datatime format you needed !

Line43: public function addFieldsToFilter($fields) {
.......
.......
.......
.......
Line96: if (!Zend_Date::isDate($conditionValue['from'])) {
.......
Line109:if (!Zend_Date::isDate($conditionValue['to'])) {
.......
}

Now You need to modify those 2 lines with the new datetime format you change the search block to allow this method to be validated

For instance i modified the Javascript calendar format to be %d-%m-%Y which will produce Date in the calendar like ( 25-12-2014 )

Then i modified The method in the above collection class to be like this

if (!Zend_Date::isDate($conditionValue['from'], 'd-m-Y' )) { // I added the format for the validation 
.......
.......
if (!Zend_Date::isDate($conditionValue['to'], 'd-m-Y' )) { // same as above one 

step 3:-

Change those value of date inputs in the class Mage_CatalogSearch_Model_Resource_Advanced_Collection to whatever format or locale.

Everything works fine with that.

I have made small module that rewrite the 2 classes you need to modify based on the locale you need

Check it out https://github.com/Meabed/magento-advanced-search-datetime-field

Regards !

Don't forget about locale! As all other examples can cause issues for people from different time zones.

Mage::app()->getLocale()->date()

inside date() you can put any date and call method ->toString() with some param.

Pattern examples you can find in Varien_Date

const DATETIME_INTERNAL_FORMAT = 'yyyy-MM-dd HH:mm:ss';
const DATE_INTERNAL_FORMAT = 'yyyy-MM-dd';

const DATETIME_PHP_FORMAT       = 'Y-m-d H:i:s';
const DATE_PHP_FORMAT           = 'Y-m-d';

or use any you like.

For example for current time full call will look like this:

Mage::app()->getLocale()->date()->toString(Varien_Date::DATE_INTERNAL_FORMAT);