National Kiwifruit Day is observed worldwide every December 21, celebrating the kiwifruit, which is native to China but gained popularity through its introduction to New Zealand. The holiday recognizes the fruit's history, which includes its first description in Chinese texts during the late Song dynasty and its cultivation in New Zealand by Mary Isabel Fraser, who brought kiwi seeds from China in 1904. The kiwifruit, also known as Chinese gooseberry, underwent several name changes before being officially named kiwifruit in the 1950s, inspired by New Zealand's native kiwi bird. On this day, people enjoy kiwifruit in various ways, such as eating it raw or incorporating it into desserts, while sharing their celebrations on social media with the hashtag #NationalKiwifruitDay. The day coincides with the first day of astronomical winter in the Northern Hemisphere and summer in the Southern Hemisphere.