stardates
Stardates are a fictional dating system used in the Star Trek franchise. They are intended to represent the passage of time in a standardized way across various episodes and series, even though the exact conversion from Earth years to stardates is not always consistent. The concept was introduced in the original Star Trek series to give the show a futuristic feel, and the numbering system has evolved and been refined over the decades.
The exact purpose of stardates within the Star Trek universe is to provide a means of temporal