Datepicker, reverse bidding

Hello
trying to add a datepicker that show the end date in Posts.

I have a page post_meta.php that i have: price, location, latitude, longitude.

And after that time, the posts goes offline.

And i′m trying to add like a countdown to the page, that show: ex 4 days 2 hour 12 min 5 sec

If nobody understand i′m trying to make a reverse bidding system.

Hope someone have some idé…I′m stuck right now.

I find this one:
https://bottls.wpgenie.org/product/la-poderosa-2/

I need the : Time left, Auction ends