To be able to use the Form Versioning (by date) functionality, you first need to enable the Date Versioning for the Survey.
Get started on the main Admin Page.
Select a client, head to the Clients tab and use the Client & Form Settings link, or simply use the Quick Jump bar.
Once on the Client Administration page, simply click on the Survey name.
Scroll down to the Advanced Survey Options section on the Survey Settings page, and mark the checkbox next to the Allow form versioning (by date) label.
Don't forget to scroll to the bottom of the page and use the Save Changes button!