This article is in Russian — the editorial team currently writes them in Russian only.

The History of the Chinese Baby Gender Calendar: The Legend of the Imperial Temple
When the history of the Chinese baby gender calendar comes up, the imagination immediately conjures an ancient scroll discovered in the hall of an imperial temple. In reality, it is less an archaeological fact than a blend of legends, methods based on calculating the mother’s lunar age, and later folk interpretations. The original chart known today entered popular circulation in the 19th and 20th centuries, while its historical roots lie in the Chinese tradition of keeping lunar calendars and observing fertility cycles.
The supposed “discovery” is linked to an imperial temple because temples and palace archives really did preserve astronomical tables, prophecies, and the work of court astrologers. Attributing the formula to an imperial setting gave it authority: if it was found in the emperor’s domain, it must be ancient and wise. What is more, the market for folk beliefs benefited from supporting such practices with legends of palace origins, so the idea of a tomb or temple discovery quickly took root.
The “Chinese baby gender calendar” does not stand up well to scientific testing: numerous studies show an accuracy rate close to chance. Yet its story and association with imperial temples reveal something else—how society lends significance to knowledge through the authority of a place. It is a fascinating example of how folklore, astronomy, and marketing became intertwined in a single chart that still sparks curiosity and a smile today.