At the moment, if you have anyone on your projects that have a specific Holiday calendar enabled then the Holidays will be listed as blackout dates within your project plans and work is not resourced/scheduled for those days. Unless the person is removed from the project or they unsubscribe to the specific Holiday Calendar this cannot be updated.
The request here is to update Hive overall settings so that ONLY if a person is assigned during the SPECIFIC action card where a holiday happens the dates shift to use Holiday blackout dates. Instead of just applying that setting to the entire project plan regardless of whether a person is assigned to an action card where the holiday will occur or not.
The context is for if multiple regions are working on a project, IE: US and UK, and only UK holidays should apply to people assigned to cards with that Holiday calendar subscribed, and not to everyone working on the project as US folks don't observe UK Holidays and vice versa.