28th century
The 28th century was defined in the calendar of Earth as being from 2701 until 2800.

Events 
 The 's mysterious benefactor originated from sometime this century. ()
 The Velara III natives estimated that Starfleet will be welcome back to their planet in this century. ()

 (circa)
 Atomic decay measurements taken on a probe launched from the  in a temporal distortion in the 2250s suggest it has reached this era, five hundred years into the future. The probe returns upgraded and apparently sent back to collect information. ()

 A neutron star in a binary star system in the Kavis Alpha sector explodes. ()

 A group of Federation anthropologists from this century travel back in time and observe the construction of the Great Pyramid at Giza, using the proper procedures set forth in the Temporal Accord. ()

External link 
 

bg:28 век
de:28. Jahrhundert
es:Siglo 28
fr:28ème siècle
nl:28e eeuw
sv:2700-talet
it:XXVIII secolo