Off/Active Recovery:
I am more than ok with an additional day off here.  Listen to your body, if you need a second rest day in the week make sure you take it!  It is better to rest and be ready to train rather then keep digging in a hole as races happen more and we put more wear and tear on our body!
Keep the intensity low, have fun on the bike!  Ride the pump track, skatepark, trails, cruise around your neighborhood.  Something to get the body moving but NOT training.  Just enjoy some time on the bike. 20 min minimum.