How to extend LIS rotation for a 3x/wk exerciser?

[Bettypcw]

I work out 3x a week, instead of the 6 days Cathe's rotations indicate. Is there an easy way to extend the month's rotation into 3 months? I can see where I select the start date for a rotation, but not an end date. Moving workouts from one month to the next is logistically difficult.

Thanks!
Betty