Jefferson Davis's Birthday is observed as a state holiday in some parts of the United States, particularly in the South. Jefferson Davis (1808–1889) was the President of the Confederate States of America during the American Civil War. The holiday commemorates his life and contributions to the Confederacy.

The Agong’s Birthday, also known as the Official Birthday of the Yang di-Pertuan Agong, is a significant public holiday in Malaysia that celebrates the birthday of the country’s King (Yang di-Pertuan Agong). It is a day to honor the Malaysian monarch and the constitutional monarchy system.

The King’s Birthday is a public holiday celebrated in Australia to honor the reigning monarch’s birthday. While the actual birthday of King Charles III is on November 14, the holiday is traditionally observed on the second Monday in June in most Australian states and territories.

King Kamehameha I Day is a state holiday in Hawaiʻi to honor King Kamehameha I (1758–1819), the first monarch to unite the Hawaiian Islands under a single rule. Known as Kamehameha the Great, he is celebrated for his leadership, vision, and contributions to the foundation of the Kingdom of Hawaiʻi.

King’s Birthday in Tuvalu is a national public holiday, and it honors the official birthday of the reigning British monarch, who serves as Head of State in Tuvalu, a Commonwealth realm and constitutional monarchy.

King’s Birthday in the Turks and Caicos Islands is a public holiday that celebrates the official birthday of the reigning British monarch, currently King Charles III. As a British Overseas Territory, the Turks and Caicos Islands observe the King’s Birthday in line with the tradition followed across many Commonwealth realms and territories.

The Sultan of Kedah's Birthday is an annual celebration in the Malaysian state of Kedah, honoring the reigning Sultan. This day is observed as a public holiday in Kedah, allowing citizens to participate in festivities and pay tribute to their ruler. The Sultan of Kedah holds a revered position as both a constitutional monarch and a symbolic leader who embodies the state's heritage and unity.