The Mid-Autumn Festival in Guangzhou, China, typically ends on the 15th day of the eighth lunar month. In 2026, the Mid-Autumn Festival will end on October 2nd. This date is based on the traditional lunar calendar, which varies each year. The festival usually begins on the first day of the lunar month and concludes on the 15th day, marking the full moon. Guangzhou, as a major city in southern China, follows the same lunar calendar as the rest of the country, making the end date consistent across the region.

The Mid-Autumn Festival is a significant cultural event in China, celebrated with family reunions, mooncake consumption, and various traditional activities. The festival's timing is determined by the lunar cycle, which is why the date changes annually. The full moon, a key element of the celebration, occurs on the 15th day of the lunar month, which corresponds to the end of the festival. This year, the full moon will be on September 30th, and the festival will conclude on October 2nd.

Historical records and astronomical data support the accuracy of this date. The Chinese lunar calendar has been in use for over 4,000 years and is based on the phases of the moon. The calendar is a combination of lunar and solar cycles, with each month starting on the new moon and ending on the full moon. This system ensures that the Mid-Autumn Festival always falls on the same day of the lunar calendar, regardless of the Gregorian calendar date.

The timing of the festival is also influenced by the astronomical phenomenon of the full moon. The full moon occurs when the Earth is directly between the sun and the moon, making the moon appear fully illuminated. This event is celebrated in many cultures around the world, not just in China. The full moon's occurrence on the 15th day of the lunar month is a natural and consistent occurrence, which is why the Mid-Autumn Festival ends on October 2nd in 2026.