Standard Time are the time units used in the Galactic Commons.
A Standard Day is slightly longer than a day in Sol system time, and a Standard Year - normally called simply a Standard - is considerably longer. A Standard is at least 397 Standard Days. The exact length is not known, but since 5 Sol years are equal to between 3 and 4 Standards, a Standard is about 500 Sol days long.
Standards are also divided into units of time called Tendays, which are used in a similar way to weeks in Sol time.