The King's Birthday, recognised in the Solomon Islands, is a significant event honoring the birthday of the monarch. As a member of the Commonwealth, the Solomon Islands observe this national holiday as a sign of their continued allegiance to the crown. Celebrations for this day usually occur on the second Monday of June or around mid-June, corresponding to the official celebration in the United Kingdom for Queen Elizabeth II's birthday.

Although it is not the actual birth date of the current monarch, Queen Elizabeth II, who was born in April, the King's Birthday has been celebrated in the summer according to the tradition set by King Edward VII. The holiday is marked by a number of different festivities, both public and private. Government offices, schools, and businesses generally close for the celebration, giving people in the Solomon Islands a day off of work and school.

The King's Birthday is an important reminder of the Solomon Islands' historical ties with the United Kingdom. It is one of the most recognized and celebrated events in the Solomon Islands, with citizens participating in various activities including flag-raising ceremonies, parades, and communal feasts. The day serves as a unifying occasion, bringing together communities in the Solomon Islands for a shared celebration.