These are all reblooming clematis that bloom on new wood and also on old wood (the previous year's growth then again on the current year's growth).
Pruning Group 2 Clematis
Pruning group 2 clematis isn't necessary. However if you do choose to prune these, it is best to do so during periods when the plant isn't blooming. Either in late fall or early winter. You can also prune quick in early spring as new growth emerges.