I want to add a new date field to an existing content type, and set the new field automatically for existing nodes to be equal to another date field from that content type.
For example, if the new field is called ‘Event date’, and there is an existing field ‘Publication Date’, I want the ‘Event date’ field to contain the date from the ‘Publication date’ field for all existing nodes, without assigning each one manually.
Is this possible?