Remove time limit of 30 days on ILT Attendance and ILT Registration Reports

I have two-day classes that associates are unable to attend both days. I record their attendance for the 1st day and schedule them for another class at a later date. These classes don't always fall within 30 days of each other. Therefore, I am having to keep track of these associates manually. If I was able to have no limit on days, then I would be able to track these associates using this report.