Lu Ban's Birthday is a traditional festival commemorating Lu Ban, the patron saint of craftsmen.

Lu Ban's Birthday is a traditional commemorative day that has been passed down among the Chinese people in honor of Lu Ban, the famous craftsman of ancient times. Lu Ban's surname was Gongshu and his given name was Ban; he is said to have lived in the State of Lu during the Spring and Autumn period, and because of his outstanding skills he was revered by later generations as the patron saint of carpenters, bricklayers, stonemasons and the hundred crafts. Around his birthday, customs of honoring the patron saint and valuing craftsmen gradually took shape in various places, becoming an important part of traditional craftsman culture.

As for the exact date of the birthday, accounts differ from place to place; the more common folk version is the seventh day of the fifth lunar month, while some areas choose another day according to local tradition for commemorative activities. In the past, on this day many craftsmen would set aside their work, burn incense and pay homage, giving thanks for the patron saint's gift of craft, and some woodworking shops and construction firms would also take the opportunity to gather, exchange ideas and compare skills.

In folk legend, Lu Ban is regarded as the inventor of many tools and implements; the saw, the plane, the carpenter's square and the ink marker are all attributed to him, and the stone mill, which is closely related to farming life, is also said to be connected with him. Although these claims are hard to verify one by one, they reflect the common people's admiration for technical improvement and ingenious creation.

In rural construction and daily production, Lu Ban's Birthday carries the craftsman spirit of respecting teachers and craft and striving for excellence. Today some places still keep the tradition of making offerings to Lu Ban, and craft apprenticeship activities are often held on this day, letting the younger generation learn about traditional building techniques and feel the inheritance of wisdom from working people.