Graha–Ketu–Utpāta Lakṣaṇas: Solar/Lunar Omens, Comets, Eclipses, and Calendar Rules
कृष्णापंचदशी माघे द्वापरादिरुदीरिता । कल्पादिः स्यात्कृष्णपक्षे नभस्यस्य त्रयोदशी ॥ १४८ ॥
kṛṣṇāpaṃcadaśī māghe dvāparādirudīritā | kalpādiḥ syātkṛṣṇapakṣe nabhasyasya trayodaśī || 148 ||
教中说:兜婆罗纪元(Dvāpara)之始在摩伽月(Māgha)的阿摩婆娑耶日(Amāvāsyā,即黑半月第十五日 Kṛṣṇā Pañcadaśī);而一劫(Kalpa)之开端,则在那婆娑耶月(Nabhasya,即婆陀罗钵陀 Bhādrapada)黑半月第十三日(Trayodaśī)。
Sanatkumara (in dialogue with Narada)
Vrata: none
Primary Rasa: shanta
Secondary Rasa: adbhuta
It links cosmic cycles (yuga and kalpa) to sacred lunar time (tithi and month), showing that dharmic life and contemplation of liberation are grounded in precise, sanctified time-reckoning.
By emphasizing holy calendrical moments, it supports disciplined observance—choosing auspicious tithis for worship and vows—so devotion becomes steady and aligned with sacred time.
Vedāṅga Jyotiṣa: the practical use of lunar months and tithis (Amāvāsyā, Trayodaśī; Māgha, Nabhasya/Bhādrapada) to mark ritual and cosmological commencements.