No project team can do without it: A look at the wall planner provides information about important deadlines and dates and keeps everyone involved up to date. The planner is available as an annual calendar in a 12 or 16 month version. The year-round wall planner was invented in the 1980s by the Stuttgart graphic designer Hubertus Carl Frey. It is the largest of the wall calendars and makes it easy to keep organized throughout the year. If the wall planner has your logo and your advertising message, it will remain visible to users all year round.