Like other sheets, it would be good to the ability to either (1) float in the list of public holidays of a country, or (2) allow manual input of non-working days; And then highlight these days on the Gantt Chart or other views, so that in terms of scheduling, these days are not calculated in terms of billings or other matters.
It will also be using for, say in the future when you are putting in a 'Days/Hours Left' column on Gantt, then this value won't include non-working days.
Thank you.