Tithi-Nirṇaya for Vratas: Ekādaśī Rules, Saṅkrānti Punya-kāla, Eclipse Observances, and Prāyaścitta
शुल्के वा यदि वा कृष्णे भवेदेकादशीद्वयम् । गृहस्थानां तु पूर्वोक्ता यतीनामुत्तरा स्मृता ॥ ४५ ॥
śulke vā yadi vā kṛṣṇe bhavedekādaśīdvayam | gṛhasthānāṃ tu pūrvoktā yatīnāmuttarā smṛtā || 45 ||
若在白半月(Śukla)或黑半月(Kṛṣṇa)出现两次爱迦达希相继之情形,则居家者应取前一日为所守;而离欲行者(yati)则以后一日为其常规。
Sanatkumara (teaching Narada in the Ekadashi-vrata discussion)
Vrata: Ekadashi
Primary Rasa: shanta
Secondary Rasa: bhakti
It preserves the integrity of Ekadashi-vrata by giving a clear dharmic rule for rare calendrical overlaps, ensuring devotion and restraint are practiced correctly according to one’s āśrama (life stage).
By regulating Ekadashi observance for different practitioners, it supports steady Vishnu-bhakti through disciplined vrata practice—householders follow a feasible rule, while renunciants adopt the stricter option.
It reflects Jyotiṣa-oriented calendrical reasoning (tithi-based vrata timing) applied within Smṛti/Purāṇic ritual law—how to choose the correct Ekadashi when two occur in a fortnight.