| 2015 2016 2017 2018 2019 2020 2021 |
| 1980s 1990s 2000s 2010s 2020s 2030s 2040s |
| 20th century - 21st century - 22nd century |
Events
- Advancements in sublight propulsion technology make sleeper ships obsolete. (TOS: "Space Seed")
- Development of first impulse engines. (TOS novel: The Rings of Time)
- The Dax symbiont is born on Trill. (DS9: "You Are Cordially Invited")