कालनिर्णयः (युग-मन्वन्तर-कल्पप्रमाणम्) — Measures of Time and Cosmic Cycles
तत्प्रमाणैः शतैः संध्या पूर्वा तत्राभिधीयते संध्यांशकश् च तत्तुल्यो युगस्यानन्तरो हि सः
tatpramāṇaiḥ śataiḥ saṃdhyā pūrvā tatrābhidhīyate saṃdhyāṃśakaś ca tattulyo yugasyānantaro hi saḥ
တူညီသော စံနှုန်းအတိုင်း၊ အစပိုင်းအကြားကာလကို ‘Sandhyā’ ဟု ခေါ်၍ ယုဂ၏ အရုဏ်ဦး ဖြစ်သည်။ ထိုနှင့် တူညီသော ‘Sandhyāṃśa’ သည် ယုဂပြီးနောက် ချက်ချင်းလိုက်လာသော အဆုံးသတ် ဆည်းဆာကာလ ဖြစ်သည်။
Sage Parāśara (teaching Maitreya)
They are the transitional ‘junction’ periods that frame each yuga—Sandhyā as the opening dawn and Sandhyāṃśa as the closing twilight—showing that time moves through ordered thresholds rather than abrupt breaks.
He states that a yuga is bordered by two equal intervals: an initial Sandhyā and a concluding Sandhyāṃśa, each measured according to the same previously given numerical standard.
Even in technical chronology, the Purana presents a cosmos governed by lawful order—time itself is structured—reflecting Vishnu’s sovereign regulation of creation and dissolution through precise cosmic rhythms.