Paper Calendar Tears Off Its Pages Automagically

This daily calendar mixes analog, digital, nature, and poetry all in one: Every autumn day, each of its pages will fall off automatically, torn by a clever mechanism at its top. As this video shows, it works great. But why?

Because in autumn, leaf falls, that's why. And because it was commissioned as a promotional tool for clients by leaf blower manufacturer Stihl. [Direct Daily]