The reference to "Friday's child" in numerous creative works stem from this old nursery rhyme:
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 for its living
And a child that's born on the Sabbath day
Is fair and wise and good and gay.
The author of the rhyme is often attributed as Mother Goose, but the oldest reference I could find cites
Traditions of Devonshire (A. E. Bray), 1838 (which is years after the publishing of Mother Goose's Melody, 1765).
The phrase is used just about everywhere as a reference to the birth of "the loving child". A short list of works (in no particular order):
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