2390s
The 2390s decade covers the period from 2390-2399.

Years

Events 
 A new variant of the Starfleet uniform is introduced. ()
 2395: According to the imager at the Velara Base, this year is when Velara III would have become a class M planet suitable for colonization. However, the project was discontinued with the discovery of the microbrain in 2364. ()
 Because of the ban on synthetics, Thaddeus Troi-Riker is unable to be treated for mendaxic neurosclerosis and passes away. ()
 In 2367, Lwaxana Troi estimates that Kaelon II would be destroyed or sterilized by its dying sun in thirty or forty years. ()

Alternate timelines 
Consistent throughout all timelines:
Starfleet introduces a new combadge design by 2390, and a new uniform at some point after.

The following events took place in an alternate timeline in which the  returned to Earth after Voyager crash landed due to faults in a quantum slipstream drive. ()
2390: Chakotay, with the assistance of Harry Kim, Tessa Omond, and The Doctor (after being reactivated) changes the timeline so that Voyager doesn't crash on the Class L planet.

The following events took place in an alternate timeline in which Benjamin Sisko was displaced out of time. ()
2391: Jake Sisko begins to study subspace mechanics and was awarded with a Betar Prize for his Collected Stories.

The following events took place in an alternate timeline in which the  did not enter the Borg transwarp conduits and return to Earth in 2378. ()
 2392: The Doctor invents a synaptic transceiver for a neural interface.
 2394: Voyager returns to Earth after 23 years in the Delta Quadrant. Chakotay dies in the same year.

Episodes
  (in part)
  (in part)
  (in part)

Apocrypha
The Path to 2409 lists events leading up to Star Trek Online during this time.  was initially intended to be set in 2399, but after development of the game was given to Cryptic Studios the setting was moved to 2409.

2393: Bajor gains full Federation membership.
2399: The Khitomer Accords dissolve. (Star Trek Online)

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