Books to Bed Boys 12 Days of Christmas PajamasStories to wear and share. The Twelve days of Christmas (a poem that became a holiday tradition as early as the sixteenth century) is now a darling adaptation. In the age old tradition of the bedtime story, Books to Bed 12 Days of Christmas Boy combines a best selling hardcover childrens story book with a set of matching motif, 100% cotton, snug fitting, long john pajamas.