Are they frozen together in cryovac, or separate? If together, take them out today and put them in the fridge. If separate, I'd take them out tomorrow night and put them in the fridge. Check on them friday morning. If they still are rock hard, move them to a warmer place in your fridge.
If they thaw a little early, no problem. you'll be cooking them in time so it won't be an issue.
- Adam