Deploy the same logic you can use to Hide/Show field in Service Catalog to the Change Catalog.
@joeybrown Do you have a timeline for this? I was searching for this kind of feature request because I noticed that I can't reference fields from a custom form in custom titles for change management, AND I noticed that the field for NON-custom forms for change management does NOT have date/time...just date.
@cdow2011 we are aiming for this year but it is relying on other work that needs to be done to better support it. This continues to be a high priority for us.