dvādaśyām - on the twelfth day of the moon; savitā - the sun; atiṣṭhat - was staying; madhyam-dina-gataḥ - on the meridian; nṛpa - O King; vijayā-nāma - by the name Vijayā; sā - that day; proktā - is called; yasyām - on which; janma - the appearance; viduḥ - they know; hareḥ - of Lord Hari.

O King, when the Lord appeared — on dvādaśī, the twelfth day of the moon — the sun was at the meridian, as every learned scholar knows. This dvādaśī is called Vijayā.