The 5SOS wall calendar is a must-have for fans who have been "Derping Since 2011." BrownTrout is committed to sustainability.Classic square format. Updated style. The 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 months grid is large enough for daily tasks and appointments.