Tithi-Nirṇaya for Vratas: Ekādaśī Rules, Saṅkrānti Punya-kāla, Eclipse Observances, and Prāyaścitta
पूर्वद्वये परेद्युः स्यात्संगवात्परतो मनीषिभिः । सद्यः कालः परेद्युः स्याज्ज्ञेयमेवं तिथिक्षये ॥ ३९ ॥
pūrvadvaye paredyuḥ syātsaṃgavātparato manīṣibhiḥ | sadyaḥ kālaḥ paredyuḥ syājjñeyamevaṃ tithikṣaye || 39 ||
جب تِتھی کا کَشَی (زوال) ہو تو دانا کہتے ہیں کہ پہلے دو حصّوں میں ‘پرَیدیُہ’ (اگلا دن) مانا جائے؛ مگر سنگَو کے بعد ‘سدیَہ’ کا وقت بھی اگلے دن ہی سے متعلق سمجھا جائے—یہی قاعدہ ہے۔
Sanatkumara (teaching Narada)
Vrata: none
Primary Rasa: shanta
Secondary Rasa: adbhuta
It safeguards dharma by ensuring vows and worship are performed at the correct sacred time; accurate kāla (time) is treated as an essential support for meritorious action.
Bhakti practices like vrata, pūjā, and upavāsa depend on proper tithi timing; the verse provides a rule so devotion is aligned with śāstric time-reckoning even during tithi-kṣaya.
Vedāṅga Jyotiṣa (astronomical calendrics): it gives a decision rule using saṅgava and day-divisions to assign ‘same-day time’ to the next day when a tithi is lost.