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 blithe and bonny, good and gay.

If you don't know your weekday of birth, this website provides a great tool.