Movies
- Star Trek: First Contact (in part)
Episodes
- ENT: "In a Mirror, Darkly" (in part)
Events
Prime reality
- April 4th - A Borg sphere arrives from 2373 in an effort to prevent first contact. The USS Enterprise-E arrives minutes later and destroys the sphere before it can do too much damage. As a result, the crew of the Enterprise attempt to get history back on track and make sure First Contact happens. (Star Trek: First Contact)
- April 5th - Zefram Cochrane launches the Phoenix, mankind's first manned warp-capable ship, from a remote location in the continental United States of America with William Riker and Geordi La Forge as passengers from the Enterprise-E who arrived from 2373 the day before. Its brief warp flight is detected by a Vulcan survey ship, the T'Plana-Hath, passing through the local sector, and the ship changes course to investigate. This leads to the historic First Contact between Humans and extraterrestrial life (of public record, as earlier unofficial and unbeknownst contacts had been made).
- Lieutenant Hawk is lost in this year after being assimilated. He was later shot out into space by Lieutenant Commander Worf. (Star Trek: First Contact)
- Debris from the Borg sphere, destroyed by the USS Enterprise-E, impacts on Earth near the North Pole. The debris remained undiscovered until March 1st, 2153. (ENT: "Regeneration")
- First manned flight of a spacecraft equipped with warp engine by Zefram Cochrane. (VOY: "Friendship One")
Mirror universe
- April 5th - In the mirror universe, Zefram Cochrane kills the first Vulcan to set foot on the planet Earth. (ENT: "In a Mirror, Darkly")
| 2062 | 21st century 2060s |
2064 |