It is very easy for a user to change date wrapper of post.

datewrapperbackend

Follow some steps to change the wrapper/container of date.
Step 1 First click on Manage Templates menu of WP Post Pro Plugin,a list of templates will display in new window.
Step 2 Now choose and click on Edit link to make changes in post listing.
Step 3 Scroll down on Date Settings section and in Date Wrapper
type the wrapper/container of date.
Step 4 At last click on Save Template button at the bottom of the page.

postdatewrapper

Video Tutorial