I think this is Saint Marie's day. Everyday of the calendar has a saint's name to go with it, and the French still recognize their saint's day even though they are now all atheists. On the front it says, "We tuck her in with a story" and on the back it says "Dear Marie, On this day of your holiday we offer you our best wishes and hope for your happiness and that all your desires will be fulfilled. Rene joins us in wishing you a good and happy holiday. Receive, dear Marie our most affectionate kisses" signed Odette and Jane