The country of Czechoslovakia peacefully dissolved into two nations, the Czech Republic and Slovakia.
Source
The Julian Calendar was used for the first time.
Medical researcher Oswald Hope Robertson performed the first-ever blood transfusion using stored and refrigerated blood.
Same-sex marriage became legal in Austria.
Ellis Island opened as a US immigration inspection station.
The dwarf planet Ceres was discovered by an Italian monk called Giuseppe Piazzi.
