I'm not sure just what zone I am in, how do I find out?

I have been reading on the web that you do not need to dig up your Dahlia bulbs in the fall. Is this true?

I have always dug them up in the fall and put them in pails with sawdust and stored them in the basement til spring. I then take them out and wet the sawdust and wait for them to sprout before I put them back in the ground.