The “Chrono-Shredder” is a calendar created by Susanna Hertrich.

Official notes about this device (via Hertrich’s website):

The Chrono-Shredder is a device that reminds us of the preciousness of our lifetime. It represents the passing of time by shredding the days of the year – printed on a paper roll – at a slow constant rate. To shred one day takes 24 hours. There is no “off”-button. As the seconds pass by, the tattered remains of the past pile up under the device…

Link via Scene 360 Illusion