Mahavir Jayanti, also known as Mahavir Janma Kalyanak, is the most important religious holiday for Jains. It celebrates the birth of Mahavira, twenty fourth and the last Tirthankara (Teaching God) of the present time cycle.
Mahavira was born into royalty as the son of King Siddartha of Kundgraam and Queen Trishala. During her pregnancy, Trishala was believed to have had a number of auspicious dreams, all signifying the coming of a great soul. The exact number of dreams differs according to the school of Jainism; Svetambaras generally believe that the actual number is fourteen while Digambaras claim sixteen instead. Regardless, the astrologers who interpreted these dreams claimed that the child would become either a Chakravarti or a Tirthankara. It is said that when Queen Trishala gave birth to Mahavira, the god-king Indra bathed the newborn himself with celestial milk, a ritual essentially marking him as a Tirthankara.