Revākhaṇḍa ascribed to the Vāyupurāṇa (RKV) 57.12

57.12

tatparva kīrtayāṃścakruḥ padmakaṃ nāma nāmataḥ /
ādityasya dinaṃ tvadya tithiḥ pañcadaśī tathā //

proclaimed that auspicious conjunction by the name of Padmaka: / 'Today is the day of the sun, and the lunar day is the fifteenth;