Can you replace the question mark with a number?

An absent-minded husband thought he had conquered his problem of trying to remember his wife's birthday and their anniversary.
He opened an account with a florist, provided that florist with the dates and instructions to send flowers to his wife on these dates along with an appropriate note signed, "Your loving husband."
His wife was thrilled by this new display of attention and all went well until one day, when he came home, kissed his wife and said offhandedly, "Nice flowers, honey. Where'd you get them?"