![Perpetual Calendar Postcard](http://obscuriosityshop.com/cdn/shop/products/perpetual-calendar-postcard_1024x1024.jpg?v=1448987292)
Perpetual Calendar Postcard
This card will allow you to find out which day of the week fell (or will fall) the date you want to know and throughout 1200 with a few simple calculations.
Here we present it as a postcard. It is functional, with rotating disc and beautifully decorated.