Editing Holidays in Business Hours

It’d be great if it was possible to edit the date of existing Holidays in Business Hours.

At the start of every new year, there are Holidays that have shifted by 1 or more days and currently it is not possible to edit these days, e.g. Good Friday.
Instead we either have to add an Exclusive Holiday and delete last year’s entry OR reimport using the a Regional Holidays option.

The problem with the Regional option, is that it adds holidays that are not valid for the particular location and have to be manually deleted, e.g. Melbourne Cup Day is only a holiday in Victoria but not in any other Australian State.