What Time Is It Ok To Start Shoveling Snow Tomorrow? [POLL]

There's going to be snow on the ground tomorrow. Some areas more, some less, but there will be snow. So what time is too early to shovel on a Saturday morning?

Obviously, if you have to work in the morning, these rules do not apply. You have to do what you have to do, right? But for those of us who don't have to head to work tomorrow but still want to get it done, when can we get started ?

Saturday kind of complicates things, too. Maybe the neighbors want to sleep in a little. It's supposed to be a day with some relaxation, right? But I'm the kind of guy who wants to get it done so I don't have to think about it. 

So what do you think?