It's Tuesday, two days before Thanksgiving and three days before Black Friday when stores all over the US both online and brick and mortar stores have massive sales. If you're a store owner you've most likely been planning promotions for weeks. One of the logistical issues that a new store owner might run into is how you're going to schedule sales ahead of time so that you don't have to wake up at 4am to change all of your prices.
Here it is Black Friday and Cyber Monday approaching. I want to run a sale. But I can't do it in advance without starting the sale the day I set it up. So instead of a 3 day sale, I have to run a week or a two week sale (I'm going to be gone over Thanksgiving!) which basically defeats the whole idea of a Black Friday Cyber Monday sale.
I received this feedback from a customer and thought it was worth highlighting one of those little features in WooCommerce that make it truly awesome.