Modifying Evoluted PHP Directory Listing Script to show folder date?

I'm using Evoluted Directory listing and I want to modify it for my need, here's some screenshot :

https://i.stack.imgur.com/BDUDB.jpg

https://i.stack.imgur.com/0ypwK.jpg

I want to show folder create/modified date like files date.

Here's source code of evoluted directory listing I've used

Directory Listing Script

I was try to modify it but returned date is "Jan 1st 1970at 2:00am"

<td class="text-right sm-hidden"><?= date('M jS Y \a\t g:ia', $file['modified']); ?></td>

I really need help to teach me to modify those script. Thanks.