The theme of the Meteorological Calendar, with spectacular photos of meteorological phenomena, is Hydrometeorology. While the front sides feature spectacular images of unique weather phenomena above the monthly calendar charts, the reverse sides provide easily understandable explanations of the presented weather conditions. In addition, the reverse sides also include, and this is what makes this calendar so special, concise, self-contained specialist articles in words and pictures. Everything on the reverse sides is presented both in English and German language. The calendars are available as a wall calendar (DIN A3 landscape format) and a postcard calendar (without texts on the reverse, but with a foldout desk stand).