Tithi-Nirṇaya for Vratas: Ekādaśī Rules, Saṅkrānti Punya-kāla, Eclipse Observances, and Prāyaścitta
ग्राह्या स्यादपराह्णस्था कुहूः पैतृककर्मणि । यथार्वाचीनवृद्धौ तु संत्याज्या भूतसंयुताः ॥ ३३ ॥
grāhyā syādaparāhṇasthā kuhūḥ paitṛkakarmaṇi | yathārvācīnavṛddhau tu saṃtyājyā bhūtasaṃyutāḥ || 33 ||
பித்ரு காரியங்களில் குஹூ திதி, அது அபராஹ்ணத்தில் இருந்தால் ஏற்கத்தக்கது. ஆனால் சமீபத்தில் இறந்தவர்களுக்கான (ஆர்வாசீன-விருத்தி) கிரியையில், பூதசம்யுத (அசுபத் தாக்கம் கலந்த) திதிகளைத் தவிர்க்க வேண்டும்.
Narada (teaching in a dharma/kalpa-style instruction context)
Vrata: none
Primary Rasa: shanta
Secondary Rasa: none
It teaches that ancestral offerings gain efficacy when performed in the proper kāla (time-window) and on ritually suitable tithis; correct timing is treated as a dharmic safeguard for honoring the pitṛs.
While primarily ritual-instructional, it supports bhakti indirectly by stressing disciplined, reverent observance—honoring pitṛs as part of dharmic living that sustains purity and steadiness for devotion to Bhagavān.
Vedāṅga-oriented ritual timing (kalpa) and tithi/kāla discernment (jyotiṣa): Kuhū is acceptable for śrāddha when occurring in aparāhṇa, and certain mixed/inauspicious tithis are to be rejected for recent-death observances.