यस्यां मन्वन्तरस्यादौ रथमास्ते दिवाकरः माघमासस्य सप्तम्यां सा तु स्याद्रथसप्तमी //
yasyāṃ manvantarasyādau rathamāste divākaraḥ māghamāsasya saptamyāṃ sā tu syādrathasaptamī //
Aquel séptimo día lunar (saptamī) del mes de Māgha—en el que, al mismo comienzo de un Manvantara, se dice que el Sol (Divākara) monta su carro—es, en verdad, conocido como Ratha-saptamī.
It situates ritual time within cosmic time: the day called Ratha-saptamī is linked to the commencement of a Manvantara, emphasizing how Puranic calendrics mirror large-scale cosmic cycles rather than directly describing Pralaya here.
It provides a dharma-calendar marker: kings and householders are expected to observe auspicious tithis for worship—here, Māgha saptamī for Sūrya—supporting righteous conduct through regular vrata and public/household ritual order.
The ritual significance is primary: Ratha-saptamī is defined as a Sun-related observance day (Māgha saptamī) tied to the Sun’s chariot symbolism, commonly prompting Sūrya worship and related rites rather than Vāstu rules in this specific verse.