Why do Chinese traditional festivals fall on different days of the western calendar each year?

Chinese traditional festivals are based on the lunar calendar, which differs from the solar-based Gregorian calendar used in the West. The lunar calendar is tied to the phases of the moon, leading to variations in festival dates each year. For example, the Chinese New Year falls on the first day of the lunar month, which can occur anywhere between late January and mid-February. This reliance on lunar cycles causes the shifting of festival dates in relation to the Western calendar.