Today, I was working on a Magento 2 project.

Everything was going smoothly, until I tried to add a product.

I thought code was installed properly so I was expecting a positive acknowledgement.

But instead, I faced an error which was saying:

DateTime::__construct(): Failed to parse time string (28/11/2019) at position 0 (2): Unexpected char

I had a discussion with my colleagues about it and we came with this solution.

We made an update in this file :

app/code/Magento/Catalog/Controller/Adminhtml/Product/Initialization/Helper.php

The update we are talking about is nothing, but below one line code.

private function convertSpecialFromDateStringToObject($productData)
{
	if (isset($productData['special_from_date']) && $productData['special_from_date'] != '')
	{
    	$productData['special_from_date'] = $this->dateFilter->filter($productData['special_from_date']); // Add this line
    	$productData['special_from_date'] = new DateTime($productData['special_from_date']);
	}
	...

After applying that update things worked for me. If you ever faced with such situation, I advised you to do the same.