Observed on Śukla-Dvādaśī tithi of Jyaiṣṭha (lunar) month. Perform puja of Lord Trivikrama (Sahasranamarchana), do naivedyam of mangoes and offer annadanam to needy.
अहोरात्रेण द्वादश्यां ज्येष्ठे मासि त्रिविक्रमम् । गवामयनमाप्नोति अप्सरोभिश्च मोदते॥