Stardate

A stardate was a unit of time measurement in use in the United Federation of Planets.

On Stardate 3368.5, in the 23rd century, the USS Enterprise commanded by Captain James T. Kirk visited the planet Aprilia III, where they fought the Cybermen with assistance from the Fourth Doctor.

On Stardate 45635.2, in the year 2368, the Federation planet of Delta IV was invaded by an alliance of Cybermen and the Borg. (COMIC: Assimilation²)