The Dragon Boat Festival (traditional Chinese: 端午節; simplified Chinese: 端午节; pinyin: Duānwǔ jié; Cantonese Yale: Dyūnńgh jit) is a traditional Chinese holiday that occurs on the fifth day of the fifth month of the Chinese calendar, which corresponds to late May or early June in the Gregorian calendar. The holiday commemorates Qu Yuan who was the beloved prime minister of the southern Chinese state of Chu during the Warring States period, about 600 B.C. to 200 B.C., and is celebrated by holding dragon boat races and eating sticky rice dumplings called zongzi, which were southern Chinese traditions. Dragon Boat Festival integrates praying for good luck and taking respite from the summer heat.

In September 2009, UNESCO officially approved the holiday's inclusion in the Representative List of the Intangible Cultural Heritage of Humanity, becoming the first Chinese holiday to be selected.

The English language name for the holiday is "Dragon Boat Festival", used as the official English translation of the holiday by the People's Republic of China. It is also referred to in some English sources as Double Fifth Festival which alludes to the day of the festival according to the Chinese calendar.

The Chinese name of the festival is pronounced differently in different Chinese languages. Duanwu (端午) literally means 'starting five'—i.e., the first "fifth day" of the month according to the Chinese zodiac. However, despite the literal meaning referring to the Earthly Branches, this character has also become associated with wǔ (五; wu³; 'five'), due to the characters often having the same pronunciation. Hence Duanwu, the festival on "the fifth day of the fifth month".

The fifth lunisolar month is considered an unlucky and poisonous month, and the fifth day of the fifth month especially so. To get rid of the misfortune, people would put calamus, Artemisia, and garlic above the doors on the fifth day of the fifth month. These were believed to help ward off evil by their strong smell and their shape (for instance, calamus leaves are shaped like swords).

Venomous animals were said to appear starting from the fifth day of the fifth month, such as snakes, centipedes, and scorpions; people also supposedly get sick easily after this day. Therefore, during the Dragon Boat Festival, people try to avoid this bad luck. For example, people may put pictures of the five venomous creatures (snake, centipede, scorpion, lizard, toad, and sometimes spider) on the wall and stick needles in them. People may also make paper cutouts of the five creatures and wrap them around the wrists of their children. Big ceremonies and performances developed from these practices in many areas, making the Dragon Boat Festival a day for getting rid of disease and bad luck.

The story best known in modern China holds that the festival commemorates the death of the poet and minister Qu Yuan (c. 340–278 BC) of the ancient state of Chu during the Warring States period of the Zhou dynasty. A cadet member of the Chu royal house, Qu served in high offices. However, when the king decided to ally with the increasingly powerful state of Qin, Qu was banished for opposing the alliance and even accused of treason. During his exile, Qu Yuan wrote a great deal of poetry. Eventually, Qin captured Ying, the Chu capital. In despair, Qu Yuan committed suicide by drowning himself in the Miluo River.

It is said that the local people, who admired him, raced out in their boats to save him, or at least retrieve his body. This is said to have been the origin of dragon boat races. When his body could not be found, they dropped balls of sticky rice into the river so that the fish would eat them instead of Qu Yuan's body. This is said to be the origin of zongzi.