Add duration to All-Day Tasks

There should be a way to assign a time duration for a task without scheduling it into the day. So if there are tasks you need to get done and you know how long they’ll take, but not when you want to do them, they can live at the top of the screen where the all-day tasks are, but you can see how long they’ll take. So basically it’s an all-day task, but you can still specify how long the task will take to complete.