The Add Task modal doesn't currently allow you to set a due date, either by clicking on a date selector or as a directive (i.e. as allows you to set the start date). This would be really useful for me because I often know the due date when creating a task (this is due today, this is due before I meet [person] on [date], etc) and it would be great to write that down immediately instead of having to remember to set it after creating the task. The irony is that I usually don't need to set the start date because I usually create new tasks by clicking on the date when I plan to start the task.