Narada Purana — Purva Bhaga, Shloka 54
Varṇāśrama Saṁskāras, Upanayana Windows, Brahmacārin Ācāra, and Anadhyāya Prohibitions
श्रावणस्याष्टमी कृष्णा तथाषाढी च पूर्णमा । फाल्गुनस्य त्वमावास्या पौषस्यैकादशी सिता ॥ ५४ ॥
śrāvaṇasyāṣṭamī kṛṣṇā tathāṣāḍhī ca pūrṇamā | phālgunasya tvamāvāsyā pauṣasyaikādaśī sitā || 54 ||
室罗伐那月的黑半第八日（Kṛṣṇāṣṭamī）、阿沙荼月的满月日、颇伽罗那月的新月日（amāvasyā），以及保沙月的白半第十一日（Śukla-ekādaśī）——这些都是尤为殊胜的圣洁月相日，宜行宗教修持。
Sanatkumara (in dialogue instruction to Narada on dharma/vrata timing)
Vrata: Ekadashi (implied by śukla-ekādaśī of Pauṣa; specific named Ekādaśī not given)
Primary Rasa: shanta
Secondary Rasa: bhakti
FAQs
It highlights specific tithis (lunar dates) across key months as particularly meritorious for vrata and dharmic observances, emphasizing that correct timing (kāla/tithi) strengthens the spiritual fruit of worship and discipline.
By pointing to Ekādaśī and other sacred tithis, it implicitly supports regulated devotional practice—fasting, worship, and remembrance—traditionally centered on Hari/Vishnu on such dates, making bhakti steady through calendar-based observance.
It reflects Jyotiṣa/Vedic calendrics: identifying months, pakṣa (bright/dark fortnight), and tithi (8th, 11th, new moon, full moon) for ritual scheduling—core to accurate vrata and pūjā performance.