The Name Day of King Carl XVI Gustaf of Sweden is observed every January 28. In Sweden, this day is recognized as an official flag day, where the national flag is flown on all public flagpoles and buildings from sunrise to sunset. Although King Carl XVI Gustaf was born on April 30, his name day is celebrated on this date according to the Swedish name day calendar, which was adopted by the Swedish Academy in 2001. The name days of the king, queen, and heir apparent are officially proclaimed flag days, although they are not public holidays. Many people in Sweden celebrate their name days, reflecting a cultural tradition despite the lack of official status for most name days.