How the insert date feature work?

Currently i have add date as below format.

What will be happens after 31/07/2018 into that post?

  1. It will delete after that date.
  2. Showing into different category
  3. Title will be changed like that [expired].

July 15, 2018July 31, 2018

Nothing. This is simply displays the date (and/or time) to each user in their own timezone.
It has no effect on the post.