Matsya Purana — The Gods Seek Śiva’s Refuge: The Cosmic Chariot Prepared for the Burning of T...
चक्रुश्चन्द्रं च सूर्यं च चक्रे काञ्चनराजते कृष्णपक्षं शुक्लपक्षं पक्षद्वयमपीश्वराः //
cakruścandraṃ ca sūryaṃ ca cakre kāñcanarājate kṛṣṇapakṣaṃ śuklapakṣaṃ pakṣadvayamapīśvarāḥ //
They fashioned the Moon and the Sun, and set in motion the shining golden wheel (of time); and the Lords also established the two fortnights—the dark fortnight (kṛṣṇa-pakṣa) and the bright fortnight (śukla-pakṣa).
This verse focuses on cosmic ordering after creation—establishing the Sun, Moon, and the two lunar fortnights—rather than describing dissolution; it presents time (kāla) as a divinely instituted cycle.
By defining kṛṣṇa-pakṣa and śukla-pakṣa, the verse underpins correct calendrical observance—essential for kings and householders to schedule rites, donations, fasts, and state rituals according to the proper lunar half-month.
Ritually, the two pakṣas structure auspicious timings (muhūrta and tithi-based observances); many temple festivals and consecration-related acts are planned with reference to bright/dark fortnights even when architectural details are not explicit here.