Narada Purana — Purva Bhaga, Shloka 70
Jyotiṣa-śāstra Saṅgraha: Threefold Division, Gaṇita Methods, Muhūrta, and Planetary Reckoning
उदयादुदयं भानोर्भूमैः साचेन वासराः । वसुव्द्यष्टाद्रिरूपांकसप्ताद्रितिथयो युगे ॥ ७० ॥
udayādudayaṃ bhānorbhūmaiḥ sācena vāsarāḥ | vasuvdyaṣṭādrirūpāṃkasaptādritithayo yuge || 70 ||
Mula sa isang pagsikat ng Araw hanggang sa susunod na pagsikat, ang sukat na iyon sa daigdig ay tinatawag na “vāsara” (isang araw). Sa isang yuga, ang bilang ng tithi (mga araw sa buwan) ay binibilang ayon sa mga salitang-bilang: vasu, dvi, aṣṭa, adri, rūpāṅka, sapta, adri.
Sanatkumara (teaching Narada in a Moksha-Dharma context with technical time-reckoning)
Vrata: none
Primary Rasa: shanta
Secondary Rasa: none
FAQs
It grounds dharma and moksha practice in correct kāla (time): vows, worship, and scriptural duties rely on precise day-and-tithi reckoning, so the Purana defines the day by the Sun’s sunrise-to-sunrise cycle.
Bhakti practices (vratas, fasts, pūjā timings) are performed according to tithi and vāsara; by clarifying how time is measured, the text supports disciplined, accurate devotional observance.
Jyotiṣa Vedāṅga: the definition of vāsara (solar day) and the use of bhūta-saṅkhyā (word-numerals like vasu=8, adri=7) to encode large calendrical counts such as yuga tithis.