Stardate

A stardate is a fictional system of time measurement developed for the television and film series Star Trek.

[6] Though the dating system was revised for Star Trek: The Next Generation, the pilot of Star Trek: Discovery follows the original series' dating system, starting on stardate 1207.3, which is stated precisely to be Sunday, May 11, 2256.

The remaining digits can progress unevenly, with the decimal representing the time as fractional days.

Stardates of Star Trek: Deep Space Nine began with 46379.1, corresponding to the sixth season of TNG which was also set in the year 2369.

[8] Writer Roberto Orci revised the system for the 2009 film Star Trek so that the first four digits correspond to the year, while the remainder was intended to stand for the day of the year, in effect representing an ordinal date.

[9][10][11] In the first installment of the movie trilogy, Spock makes his log of the destruction of Vulcan on stardate 2258.42, or February 11, 2258.

In The Big Bang Theory episode, "The Adhesive Duck Deficiency", Sheldon Cooper gives the stardate 63345.3, corresponding with the date of the Leonid meteor shower that year, November 17, 2009.