How to set a Validity Period on an Item in the DAM?

To make certain Items hidden (unpublished) from a certain date, simply:

Step 1 - Create an Item, or edit an existing one;

Step 2 - Below the description, in relation to the publication, click on "Published";

Step 3 - The options "Published", "Unpublished" and "Validity Period";

Step 4 - Click on "Validity Period";

Step 5 - Set the start and/or end date of publication;

Step 6 - Click Save.

NOTE: The start and end date are independent, this means that the two are not required to be defined, only one of them. After the expiration date, the Item will NOT be deleted from the DAM, it will only become visible to Content Manager Profiles.