In 2025, Mahavir Janma Vanchan (also known as Mahavir Janma Kalyanak or Mahavir Jayanti) will be observed on Sunday, April 13th. This date is based on the Jain lunar calendar, falling on the 13th day of the bright half of the month of Chaitra (Chaitra Shukla Trayodashi). This day marks the birth of Lord Mahavira, the 24th Tirthankara in Jainism, and is one of the most important festivals for Jains.