I use the task function heavily. If I need to change the due date for a task to several weeks later, it is difficult to select the correct date without an indication of the day of the week. Currently I have to leave the editor and go back to the monthly calendar, flip forward to the appropriate month, check the desired date, flip back to the current month, select the current date, select the appropriate task which opens the editor, then change the due date. Having the day of the week in the date picker would save so many steps.