There is any way to create starting and ending dates for a project?

[offray]

I'm using projectify to organize classes with my students and I would like to establish grading intervals (first from August 17 to September 11, second from Oct 11 to Nov 6, and so on).

Now I'm creating a project for each grading interval with 2 tasks, one for marking the starting grading date and other for the ending date. That's because I only see the "due" field, but not a "start" field. Is there any way to mark the beginning and end of a task/project that I'm missing?

Thanks,