Bhagwan Mahavir’s birth (Janma Kalyanak) is traditionally observed on Chaitra Shukla 13 (Trayodashi), at Kundagrama/Kundalpur near Vaishali, Bihar.

• Shwetambar tradition: 599 BCE
• Digambar tradition: 615 BCE

This day is celebrated as Mahavir Janma Kalyanak.