- On 1st January, 1589, two automaton crabs by Hans Schlottheim were registered as new items in the inventory of the Elector of Dresden's Chamber of Curiosities.
- The company name Patek & Co. was changed to Patek Philippe & Co. on 1st January, 1851.
- The German Naval Observatory, Hamburg was founded as an Institution of the German Empire on 1st January, 1875.
- On 1st January, 1888, Germany introduced a standard system of identification of the purity of precious metals.
- The Ladd Watch Case Company moved in to its new six-story factory building on 1st January, 1892.
- The clock and watch manufacturer Union was founded on 1st January, 1893 in Glashütte.
- Starting on 1st January, 1903, Oskar Hesse gave practical training at the German School of Clock and Watchmaking in Glashütte.
- The Vocational College for Prospective Siver- and Goldsmiths in Schoonhoven was declared a Vocational College of the Empire on 1st January, 1920.
- On 1st January, 1938, Herbert Wempe took over Chronometerwerke GmbH.
- On 1st January, 1939, the property rights to H. Fuld & Co. were transferred to the company Lehner & Co.. Since then, the company trades under the name Telefonbau und Normalzeit Lehner & Co.
- The manufactory Heuer and the Leonidas Watch Factory, Saint-Imier merged on 1st January, 1964 to become Heuer-Leonidas.
- In East Germany on 1st January, 1978, the Peoples' State Combine Clock and Machine Manufacture in Ruhla (VEB Uhren- und Maschinenkombinat Ruhla) is assigned to the Microelectronic Combine.
- On 1st January, 1991, Roland Schwertner from Düsseldorf founded the company NOMOS Glashütte/SA
- Jacques Delépine was born on 1st January, 1726 in Derchigny.
- Elie Huguenin was born on 1st January, 1775 in La Brévine.
- Jacques-Nicolas Forestier was born on 1st January, 1789 in Saint-Nicolas d'Aliermont.
- Wilhelm Eisenlohr was born on 1st January, 1799 in Pforzheim.
- Louis Auguste Piguet was born on 1st January, 1812.
- Eugène Constant LeCoultre was born on 1st January, 1819 in Le Sentier.
- Erhard Junghans was born on 1st January, 1823 in Zell am Harmersbach.
- Onésime Dumas was born on 1st January, 1824 in Verberie (Oise).
- Aristide-Delphin Dehame was born on 1st January, 1825 in Saint-Nicolas d'Aliermont.
- Aimée-Anastasie Auzout was born on 1st January, 1853 in Saint-Nicolas d'Aliermont.
- Guillaume-Nicolas Papin died on 1st January, 1826 in Freulleville, Seine-Maritime.
- Honorine Croutte died on 1st January, 1849 in Rouen.
- Louis Pierre Raingo died on 1st January, 1853 in Mons.
- Jean-Jacques-Pascal Sauteur died on 1st January, 1869 in Saint-Nicolas d'Aliermont.
- Constant Huguenin died on 1st January, 1874 in La Chaux-du-Milieu.
- Céline-Amélie Aubin died on 1st January, 1898 in Saint-Nicolas d'Aliermont.
- Emmanuel Olivier Boudeaud died on 1st January, 1924.
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