Patterico has a post where his daughter asked the question…he didn’t know.
Commenter sharon notes that she knew the day of the week she was born, from the poem:
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 born on the Sabbath Day,
Is fair and wise and good and gay.
Commenter jimf posted a link to a pretty cool site:
Pick the year and country and the site shows the calendar.
Pupster is a Sabbath Day baby…fair and wise and good and SUPER! Thanks for asking (NTTAWWT).