Global Discount – only on specific dates

We’re hosting many Black Friday sales, on several of our multisite subsites. Since we have so many subsites, there’s no possible way for us to activate the Global Discount feature on all of the subsites on an individual site basis… especially at the strike of midnight.

Is there any method within your plugin where we can activate a scheduled Global Discount from X date/time to Y date/time?

…and as an added bonus, it’d be super awesome if those scheduled Global Discounts could be applied to override any current Global Discounts that are currently set.