Skanda Purana — Mahesvara Khanda, Shloka 11
त्रिष्वेतेष्वथ भुक्तेषु ततो वैषुवतीं गतिम् । प्रयाति सविता कुर्वन्नहोरात्रं च तत्समम्
triṣveteṣvatha bhukteṣu tato vaiṣuvatīṃ gatim | prayāti savitā kurvannahorātraṃ ca tatsamam
When these three signs have been traversed, Savitṛ then attains the equinoctial movement (vaiṣuvatī), and he makes day and night equal in measure.
Lomaharṣaṇa Sūta (deduced; Māheśvarakhaṇḍa narration to sages)
Tirtha: Vaiṣuvata-kāla (equinox time-tīrtha)
Type: kshetra
Scene: A zodiac wheel with Sūrya at the equinoctial axis; scales or symmetrical halves showing equal day and night; horizon line with identical sunlit and moonlit portions.
FAQs
Equilibrium is a divine principle; the equinox symbolizes balance that dharmic life should emulate.
No specific site; the verse explains a universal astronomical-sacral principle.
No explicit prescription; equinoxes often serve as auspicious markers for snāna, dāna, and vrata in broader tradition.