Matsya Purana — The Ravi-Śayana
यदा हस्तेन सप्तम्याम् आदित्यस्य दिनं भवेत् सूर्यस्य चाथ संक्रान्तिस् तिथिः सा सार्वकामिकी //
yadā hastena saptamyām ādityasya dinaṃ bhavet sūryasya cātha saṃkrāntis tithiḥ sā sārvakāmikī //
When the seventh lunar day (Saptamī) coincides with the nakṣatra Hastā and falls on a Sunday, and at that time the Sun’s transit (saṃkrānti) also occurs, that tithi is called “Sārvakāmikī,” able to fulfill all desires.
This verse does not discuss pralaya; it defines an auspicious calendrical conjunction (tithi–nakṣatra–weekday–saṃkrānti) used for dharmic rites aimed at desired results.
It guides kings and householders in choosing highly auspicious times for vows, worship, and merit-making rites—supporting prosperity, public welfare rituals, and personal dharmic goals through correct ritual timing.
The significance is ritual (not architectural): it names a ‘wish-fulfilling’ tithi formed by Saptamī + Hastā + Sunday + Saṃkrānti, considered especially potent for performing vratas, dāna, and Sūrya-related observances.