Well Double Dang. In the builder it is not possible to pass merge data into an action that relates to a date field. However if you go to the XML for the page you can put in the merge field.
I made an action where a new row was created on the task object and the opportunity close date was added as the due date. Here is the XML for that action:
<action type="createRow" model="OpenTasks" appendorprepend="prepend" defaultmodefornewitems="edit"> <defaults>
<default type="fieldvalue" field="ActivityDate" enclosevalueinquotes="true" value="{{CloseDate}}"/>
I had to add the text: value=“{{CloseDate}}” in the xml.
We will add a request to have date time fields changed in actions so merge data can be applied.
