Riddle me this

We've all heard it a million times: stay at home moms don't get a day off. But I ask you, in what way do working moms get the day off?

The premise behind the "SAHMs don't get a day off " belief is that raising a child is a 7 day a week, 24 hour a day job. And as their job is to stay home and raise the child, there is no time off from said job.

Fine, fine.... but mothers who work outside the home also come home after their paying job, and they are also raising a child. So when is their day off? If you follow the logic that raising a child is a job, then don't mothers who work outside the home therefore have 2 jobs without a day off?