King’s Birthday (formerly Queen’s Birthday) in the Solomon Islands is a national holiday honoring the reigning monarch, currently King Charles III, observed in mid-June with official ceremonies, parades and community celebrations that reflect the country’s Commonwealth ties.

King's Birthday in Gibraltar is in honor of the birthday of the reigning British monarch. The day reflects Gibraltar's close ties to the United Kingdom and the Crown's historic role in the territory. The holiday symbolizes loyalty, unity, and tradition, celebrating Gibraltar's connection to the British Commonwealth and its shared royal heritage.

King Tupou VI's Birthday is a national holiday in Tonga celebrating King Tupou VI's official birthday on July 4, although his actual birth date is July 12, 1959.