User Specific countdown of 30 days

Hi how do i display to a user specific countdown

This count down should appear in a page that I have already created.

This page already exists, and it displays information specifically according to the current logged in user.

Perhaps there’s some kind of plugin that can display a countdown of 30 days from date of registration – it is important that it automatically counts down from date of registration and displays the countdown on that user specific page. via short code that the count down is done when it is done

NOTE: each count down is different and is customized to every single user.

no 2 countdowns are the same

Any help with this would be great!

my site is
http://www.StarShowsStudios.com