A nursery rhyme from the American Psychiatric Society:
Monday's kid is passive-aggressive
Tuesday's kid is compulsive-obsessive
Wednesday's kid is hypochondriacal
Thursday's kid is just plain maniacal
Friday's kid is anal-retentive
Saturday's kid is too non-attentive
But the kid who's born on the Sabbath day
defies diagnosis in every way.

The Party, After You Left (2004)