Our 2012 calendar has a beautiful South Shore photo for every month of the year.
Printed on demand by CaféPress in the US for $19.99 (USD).
In my experience I haven’t ever had to pay duty on any printed material or books ordered from the US.
Clothing is another story; if a t-shirt was not made in the US, it is subject to 18% duty as well as Canadian sales tax – even if the design was printed on it in the US.
Disclaimer: I make no guarantee that Canada Customs or the Post Office won’t charge you duty or tax. I am merely sharing my own experience. Your results may vary.