This preprint demonstrates that the genealogies of Genesis 5 and 11 encode a precessional calendar spanning11,818 years, from the Age of Virgo to the Aries/Pisces transition (+70 CE). The 22 patriarchal names arenames of time — precessional era-durations, not human lifespans. Enoch (365 years) stands apart as anintercalated solar marker whose heliocal signature identifies the system as cosmological rather thanbiographical.The system is anchored at two fixed points: Adam opens the Age of Virgo; Joseph closes the Age ofAries exactly at +70 CE (Δ = 0). The 22 patriarchal ages (LXX, −280 BC) sum to 11,818 years —equal to the sum of the six precessional era-durations, confirming mathematical coherence withoutresidual.A zodiacal boundary recalibration (Section V) demonstrates that when era boundaries are definedby patriarchal transitions rather than by conventional ecliptic extents, all six era boundariesachieve perfect alignment (Δ = 0). The resulting angular values remain close to astronomicalreferences for Virgo (44.2°) and Aries (26.9°), with moderate adjustments for intermediateconstellations — consistent with the interpretive freedom exercised by ancient cosmogonictraditions.Three independent external sources confirm the dating: the precession of the equinoxes, geologicaldating of the Younger Dryas, and the Book of Jubilees, which places the Exodus independently at−500 CE. The Greek Pentateuch (−280 BC) is the first written fixation of a Phoenician cosmogonictradition originating in Byblos, of which Philo of Byblos (+64/+141 CE) and Bardaisan of Edessa(154–222 CE) are the last attested witnesses
d'Arya Din (Tue,) studied this question.