This works for me, I am using Mozilla as my browser. When I click on the tools, then calendar of wins, I get three boxes to appear: start date, end date, forum. I click on the box for start date and a calendar appears, and I can click forward the calendar to the corresponding month. I do the same for the end date which must be 14 days beyond the start date. I will enter the forum and then the calendar of wins appears. This also works on Safari/iPad.