On Jan. 1, 1863, President Abraham Lincoln issued the Emancipation Proclamation, declaring that slaves in rebel states shall be “forever free.” (Baltimore Sun files)
Jan. 1, 1913: The U.S. Parcel Post system went into operation.
Jan. 1, 1994: The North American Free Trade Agreement went into effect.
Jan. 1, 1995: The World Trade Organization (WTO) came into being, replacing the General Agreement on Tariffs and Trade (GATT). Sweden, Finland and Austria joined the European Union.
Jan. 1, 2014: The nation's first legal recreational pot shops opened in Colorado at 8 a.m. Mountain time.
Jan. 2, 1921:...