What is the poem about Monday's child is full of grace?

Monday's child is full of grace,

Tuesday's child is fair of face.

Wednesday's child is full of woe,

Thursday's child has far to go.

Friday's child is loving and giving,

Saturday's child works hard for a living.

But the child that is born on the Sabbath day,

is healthy, wealthy, happy and gay.

actually the correct version (by that i mean the first recorded version from 1838 written in A. E. Bray's Traditions of Devonshire ) is this way: Monday's child is fair of face,Tuesday's child is full of grace,Wednesday's child is full of woe,Thursday's child has far to go,Friday's child is loving and giving,Saturday's child works hard for a living,But the child who is born on the Sabbath day,is bonny and blithe and good and gay.

So the monday and Tuesday phrases were mixed up and it says nothing about healthy and wealthy as "bonny and blithe" mean pretty and carefree - and, of course, gay means full of the joys of life.