I want to do some changes in


How can I override the file in app folder?

  • What is the purpose of your rewrite?
    – Amit Bera
    Aug 28, 2019 at 9:31
  • @AmitBera changed the script in that as per my requirements
    – Nafsss
    Aug 28, 2019 at 9:35
  • @AmitBera Can u say how to do that?
    – Nafsss
    Aug 28, 2019 at 10:09
  • You can try the plugin for it.
    – kunj
    Aug 29, 2019 at 5:27
  • @Nafisa May I know on which 2.3.* version you trying?
    – kunj
    Aug 29, 2019 at 5:35

2 Answers 2


I don't prefer to use <preference></preference> for this work.

If you want some modification at any public method of any class then I suggest use Plugin instead of preference.

<preference> means class override where <plugin> means method function/method override.

Step 1: Create di.xml at{YourVendorNAME}/{ModuleName}/etc/di.xml.This is the declaration of the plugin.

<?xml version="1.0"?>
<config xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="urn:magento:framework:ObjectManager/etc/config.xsd">
    <type name="Magento\Framework\Stdlib\DateTime\Date">
        <plugin name="DateTime_plugin" type="{YourVendorNAME}\{ModuleName}\Plugin\DatePlugin" sortOrder="10" disabled="false"  />

Step2: Create DatePlugin.php at {YourVendorNAME}/{ModuleName}/Plugin,

namespace {YourVendorNAME}\{ModuleName}\Plugin;
class DatePlugin

    public function beforeDate(
        \Magento\Framework\Stdlib\DateTime\Date $subject,
        $format = 'Y-m-d H:i:s', 
        $input = null
        return [$format,$input];

Here, i have created a before plugin on \Magento\Framework\Stdlib\DateTime\Date::date() function .


Add below code to di.xml

<preference for="Magento\Framework\Stdlib\DateTime\Date" type="Vendor\Module\Rewrite\Magento\Framework\Stdlib\DateTime\Date"/>

and create class for Vendor\Module\Rewrite\Magento\Framework\Stdlib\DateTime\Date and extend the \Magento\Framework\Stdlib\DateTime\Date

Hope it will work for you.

  • Can you tell me where is the validation for the datepicker is done. Where can i get the code?
    – Nafsss
    Aug 29, 2019 at 12:49

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