A calendar is something that is in the pipleline, albeit more likely for next year. In order to make it financially viable they would need to be made in bulk. In order to sell sufficient to break even we would realistically need to start selling them in Q3.
I was hoping to get it sorted for this year but it has been a hectic last few months and I haven't had the time. It is a great idea though, but just needs a little planning, as calendars have the disadvantage that once January comes they are immediately out of date.