There isn't, but nothing will decrease while you're away... so you don't need to worry about coming back to a gutted character or anything. The worst that will happen is that you will miss CR and break your "consecutive days played" streak (if any).
I was just sitting here having a pre-beer before I go out for a beer thinking the same thing. I too am about to see my streak ending dammit. And, I fear, it will be a year or so before I have a hope in hell of getting it back to it's current. Hoping that I am wrong, but expecting I am right. :'(