An official Rush 18-month, 12"x12" wall calendar was released last week by BrownTrout Publishers and is now available to order. From the product description:

Classic square format. Updated style. Our square 18-month wall calendars include 13 stunning images and even clearer grids and text. Each of these 12" x 12" calendars features an opening spread with a beautiful six-month (July-December 2015) calendar to plan the last six months of the year and rev up for 2016. Filled with an abundance of holidays, each month's grid is large enough for daily tasks and appointments.

You can check out a preview of all 13 images included with the calendar here, and order your copy at this location.