2015 Sierra Club Weekly Engagement Calendar 2015 Sierra Club Weekly Engagement Calendar Format: Weekly Engagement Planner, Size Closed: 6.5" x 9.5 " (approx) With more than 10 million copies sold, the Sierra Club Wilderness Calendar has been America's bestloved wall calendar for more than 40 years. The latest edition once again sets the standard with its breathtaking images of wild places across the country. Weekly grid format accompanied by full-color Photographs Ample space for notes and daily planning Bonus page includes extra notes and general entries