Adhyaya 4: अहोरात्र-युग-मन्वन्तर-कल्पमान तथा प्रलयान्ते सृष्ट्युपक्रमः
तावच्छती च वै संध्या संध्यांशश् च कृतस्य तु त्रिशती द्विशती संध्या तथा चैकशती क्रमात्
tāvacchatī ca vai saṃdhyā saṃdhyāṃśaś ca kṛtasya tu triśatī dviśatī saṃdhyā tathā caikaśatī kramāt
Для Крита-юги сумеречная стыковка (сандхья) и её завершающая часть (сандхьямша) равны по длительности — по четыреста лет каждая. Затем, по порядку, длительность сандхьи составляет триста, двести и сто лет в последующих югах.
Suta Goswami
It frames Linga-worship within Shiva’s governance of time (kāla): as yugas change and dharma declines, sādhana and ritual intensity are understood relative to the yuga’s sandhyā measures.
By defining cosmic time-junctions, it implies Shiva as Pati—Lord of kāla and niyati—who orders creation’s rhythms, within which the pashu seeks liberation from pāśa.
It highlights kāla-viveka (discernment of time): aligning vrata, japa, and pūjā with yuga-conditions—an underlying principle for Pāśupata discipline and Purāṇic observance.