National currencies across the eurozone cease to be legal tender as the euro becomes the sole official currency in twelve European countries.

East Timor formally became an independent nation, ending centuries of Portuguese colonization and 27 years of brutal Indonesian occupation that killed an estimated 100,000-200,000 people.

Actually verifying—replaced.

The Rome Statute entered into force, establishing the International Criminal Court in The Hague to prosecute genocide, war crimes, and crimes against humanity.