Portal:Anniversaries/January 1
- 1823 — German watchmaker Erhard Junghans is born.
- 1893 — Uhrenfabrik Union is established in Glashütte, Germany by Johannes Dürrstein, Dresden distributor of A. Lange & Söhne watches. It is the predecessor of today's Union Glashütte brand.
- 1964 — Heuer and Leonidas merge to form Heuer-Leonidas.
- 1991 — The Glashütte watch brand Nomos is registered by Roland Schwertner of Düsseldorf.