You can assign a deadline to each page easily in Pages.
In your Kit, click on Pages. There is a calendar dropdown you can use to assign a due date. Click on Due Date to assign a date. (Likewise, if you click on the Page name, there is a dropdown in the Page details to assign a due date.)
To remove the due date, hover over the date and click the X icon.
You can also manage the deadline from within the Page details itself: