I think you can only indicate what month you start and what month you ended? So if you did something for one week in the month of August, you probably just put 08/08-08/08. Don't think they want it to the exact date. But that's from what I hear, I won't know until after May 5th.
Yeah - start and end dates and approximate number of hours per week. Knowing something like total hours is pretty useless unless you want to average it over the number of weeks you did an activity.