Jan 1 The International Commission on Zoological Nomenclature establish the "starting point" for standardized species names across the animal kingdom, based on the binomial nomenclature by Carolus Linnaeus 10th edition of Systema Naturae
Jan 11 Russian troops occupy Königsberg, East-Prussia [NS=Jan 22]
Jan 22 Russian troops occupy Königsberg, East Prussia [OS=Jan 11]