With display of up to eight parallel work shifts. Shift rhythm and shift type can chosen individually. Computes holidays and personal events. Events can individually be entered as days or time periods. Computes number of word days per month and per shift. Grouping and differnt coloring for events. Shift plans are continued for any time period based on entered shift rhythm once a starting date is given. User friendly with online help. Can be switched between English and German language at runtime.