wallacegardens:

“Taschenkalender - pocket calendar from about 1400 CE. This pocket calendar from about 1400 was intended to be used daily by farmers and therefore could be folded. In this form it had a size of 7,5 x 6,5 cm. Besides the usual labour of the month and the respective sign of the zodiac it additionally shows a schematic representation of the average length of the day.”

(via yarrowandyew)