We're happy to introduce the Organization Calendar, where you can override the national holiday schedule of your organization, and choose instead to mark those days as working or non-working yourself. You can also create custom organization-wide holidays that will apply to all members, regardless of what country they're in.
Besides that, it's now possible for individual employees to turn national holidays on and off in their member profiles. This change adds more customization to your holiday schedule and improves support for the unique cases that an organization may have. It was one of our most requested features, and we're glad to say we now support it.