The story
Ananta means 'the endless'. The day belongs to Viṣṇu in that form, reclining on the serpent Śeṣa whose coils have no count, and in Andhra and Karnataka to Anantapadmanābha, the same figure at Śrī Padmanābhasvāmī in Thiruvananthapuram.
The Mahābhārata gives the vrata to the Pāṇḍavas. Kṛṣṇa told Yudhiṣṭhira to keep it during the years in the forest, and the brothers recovered their kingdom afterwards. The fourteen knots in the thread stand for the fourteen worlds, or in another telling for the fourteen years of exile.
The two observances share one day and do not compete: the Vaiṣṇava household ties the thread, and the Gaṇeśa maṇḍals of Maharashtra carry their images to the water. The image that arrived on caturthī leaves on caturdaśī, and the family says the same line to it — come again next year, and do not be late.
