Human Year                             

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Given the advances in biological and medical technologies over the course of history, it was decided at the time of the Forced Migration to redefine the human year to maintain continuity with past, current, and future aging trends.  Thus, while formerly defined as 365 days, as of 2051, the human year was to be defined as a multiple of 365 days times the the annual regional technology index at the time of one's birth.  Thus, those born in a UR in the year 2060 would have a Human Year value of 365 x 1.4 (the technology index for UR residents in the year 2040), or 511 days.  The purpose of the recalibration of human years, and thus an individual's human age, based on the regional technology index was to norm ages across generations and regions, where life-spans, were they not calibrated to the regional technology index, would vary greatly.  Although sometimes referred to as "21st century years," this is in fact a misnomer since no absolute value can be applied to a human year after 2051.  The term "20th century years" is likewise a common slang term referring to the human year value of 365 days, which was used to account for human aging prior to the year 2051.