Yahren

A yahren is a Colonial measurement of time, analogous to an Earth year; plural form is same as singular, "yahren".

Notes

Within some fan circles, a yahren is considered to be around two-thirds (2/3) the length of an Earth year, thus helping to explain the relative longevity of Colonial people compared to Terran humans. This reasoning is picked up in Richard Hatch's sequel novels. The glossary in the first novel, Armaggedon, states that a yahren is 200 days.

In the Re-imagined Series, time appears to be measured by the Colonials as is done on Earth with the term year. Since a year is considered the time it takes for the real-world Earth to revolve once around the sun, the use of "year" is confusing, given that the Twelve Colonies consist of several Earth-type worlds that may orbit a sun or series of suns, or even exist in adjacent solar systems and so have revolution times that may differ dramatically.

Curiously, a brief mention of "yahren" appears in the documents visible at Armistice Station in the Re-imagined Miniseries.