Portal:Anniversaries/August 28
- 1965 — American astronauts L. Gordon Cooper, Jr. and Charles Conrad, Jr. wear Omega Speedmaster watches while orbiting the earth 120 times in 9 days aboard the Gemini V spacecraft
- 2015 — Girard-Perregaux combines a big date and moon phase complication to the 1966 line, creating the 1966 Large Date and Moon Phases
- 2018 — Swatch Group and Audemars Piguet jointly announce the Nivachron anti-magnetic balance spring