When it comes to sales, the Cat Naps calendar is no sleeper. In just four years, it has become one of the most popular cat calendars ever published. It"s the perfect calendar for those who are over-worked and over-stressed, and offers visual proof of what every cat lover has always known: Cats are masters of the art of relaxation, living proof that naps are the key to contentment. 7x7 mini wall calendar.