Yes - once you've decided what box of brownies you'd like to send; before adding it to your cart you can pick the delivery date. The date you pick is the date the box should be delivered on. We will make sure the box is shipped out in time, but we cannot guarantee delivery on this day as it is down to Royal Mail to make sure delivery is made on time once we pass the box to them.
If a day is blocked out it means we have reached our limit for that day, best thing to do is choose the next closest day.