Era
An era was a period of time defined for the purposes of history. Eras could be associated with noteworthy events, people, or other qualities.

In 2267, Lieutenant Commander Spock – speaking to Terran crewmembers – referred to the mid-1990s as the era of their last so-called world war, to which Doctor Leonard McCoy responded the Eugenics Wars. ()

In 2365, K'Ehleyr beamed aboard the 23rd century ship  and began the  of the Klingon crew to their era. ()

In 2366, after the initial failure to study a stellar explosion in an unnamed binary star system in the Kavis Alpha sector, Paul Stubbs believed he lost his chance to conduct his experiment and bring about a brand-new era of astrophysics which would be postponed for another 196 years. ()

See also 
 Calendar
 Arnold Era
 Devonian
 Fusion era
 Napoleonic era
 New era
 Nuclear era
 Pre-Neskoromny Era
 TOS era

External links 
 
 

Time measurements
Historical eras