The Twelve Months (fairy tale)
"The Twelve Months" is a Czech fairy tale, which was first mentioned by a Czech writer, scholar, physician, lexicographer, canon of the St. Vitus Cathedral in Prague and a master of the University of Prague in the 14th century - mistr Klaret/Bartoloměj z Chlumce, who mentions the fairy tale as a preaching exemplum.
Source: Wikipedia — The Twelve Months (fairy tale) (CC BY-SA 4.0)