त्रेता त्रीणि सहस्राणि युगसंख्याविदो विदुः तस्यापि त्रिशती संध्या संध्यांशः संध्यया समः //
tretā trīṇi sahasrāṇi yugasaṃkhyāvido viduḥ tasyāpi triśatī saṃdhyā saṃdhyāṃśaḥ saṃdhyayā samaḥ //
યુગગણના જાણનારાઓ કહે છે કે ત્રેતા‑યુગ ત્રણ હજાર (દૈવી વર્ષો)નું છે. તેની સંધ્યા ત્રણસો છે અને સંધ્યાંશ પણ સંધ્યા સમાન છે.
It gives the technical chronology of cosmic time (yuga length plus junctions), which is used in Purāṇas to situate recurring creation and dissolution cycles within a measurable framework.
By defining yuga-phases and their transitions, it supports the Purāṇic idea that dharma-practice and governance must adapt to the spiritual conditions of each age, especially during transitional “sandhyā” periods.
No direct Vāstu or temple rule is stated; the key ritual takeaway is the emphasis on “sandhyā” as a sacred junction concept—transitional times are treated as especially significant for discipline, vows, and rites in Purāṇic tradition.