Independence Day, celebrates the independence of Solomon Islands from the United Kingdom in 1978.

An independence day is an annual event commemorating the anniversary of a nation's independence or statehood, usually after ceasing to be a group or part of another nation or state, or after the end of a military occupation, or after a major change in government. Many countries commemorate their independence from a colonial empire.

Solomon Islands, also known simply as the Solomons, is an island country consisting of six major islands and over 1,000 smaller islands in Melanesia, Oceania, to the north-east of Australia. It is directly adjacent to the Autonomous Region of Bougainville to the west, Australia to the south-west, New Caledonia and Vanuatu to the south-east, Fiji, Tuvalu, and Wallis and Futuna to the east, and the Federated States of Micronesia and Nauru to the north. It has a total area of 28,896 square kilometres, and a population of 734,887 according to the official estimates for mid-2023. Its capital and largest city, Honiara, is located on the largest island, Guadalcanal. The country takes its name from the wider area of the Solomon Islands archipelago, which is a collection of Melanesian islands that also includes the Autonomous Region of Bougainville, but excludes the Santa Cruz Islands.