The story
Three stories are told for the night. Śiva and Pārvatī were married on it. Śiva drank the poison that rose from the churning of the ocean, holding it in his throat, and Pārvatī and the gods kept him awake through the night lest it spread. And on this night Śiva first appeared as a column of light (jyotirliṅga) without beginning or end, which neither Brahmā nor Viṣṇu could measure.
The Purāṇas add a hunter who spent the night in a bel tree to escape a tiger, and dropped leaves to stay awake, and did not know the leaves were falling on a liṅga below. The unknowing worship saved him. The story is told so that no one thinks their own is too small to count.
The night is also the last dark of winter; the moon is at its thinnest, and the vigil until dawn is the tradition's answer to it.
