If that's how you want to break it up, I don't see a problem with it. It's rather unconventional to do calves on cardio day mainly because typically cardio is jogging. And that in itself could be a calf workout if you wanted(alternate running on toes for set time or distance). How in depth do you get with your ab workout? Do you just mean a couple sets of situps or are you doing a complete core workout? I see that you have 4x abs on your schedule, but no exercise name.