Proclamation Day is observed in South Australia every December 26, commemorating the establishment of the government of South Australia as a British province. The day marks the proclamation made by Captain John Hindmarsh on December 28, 1836, which officially recognized South Australia as a free settlement, distinct from other Australian territories that were founded as penal colonies. The holiday was originally celebrated on December 28 but was moved to December 26 in 1993 to coincide with Boxing Day. The celebration reflects the province's unique founding history, which was influenced by Edward Gibbon Wakefield's colonization plan aimed at attracting a diverse group of immigrants. Formal ceremonies are held on the actual proclamation anniversary, emphasizing the significance of this event in South Australia's heritage.