[Contacts] Allow date fields to be stored without timestamp in format

Ali Hough

"Allow date fields to be stored without time stamp Business Goal: Want to be able to use contact_tags for the date/time field directly in content - however currently this pulls in the automated time stamp as well. Have informed them that they can use liquid script to remove the time stamp, however their team members that are creating the content may not always be as technically savvy and would like to be able to use the contact tag directly instead of using liquid script to remove the time stamp in content."