- Dec 8 5,000 armed Boers gather in Paardekraal, South Africa
- Dec 16 Beginning of the First Boer War between British Empire and Boer South African Republic
- Dec 16 Transvaal region declares itself as the Republic of South Africa
- Dec 20 Battle at Bronker's Spruit, Transvaal: Farmers beat Britten
- Dec 20 NY's Broadway lit by electricity, becomes known as "Great White Way"