2045
Thursday, 30 March 2045
In 2045 the tithi runs from 7:38 am on 30 Mar to 5:00 am on 31 Mar, and it never reaches sunrise (the usual rule, called udaya tithi), so the day on which it begins is taken: Thursday, 30 March 2045.
2046
Thursday, 19 April 2046
In 2046 the tithi runs from 10:00 am on 18 Apr to 6:38 am on 19 Apr; it is running at sunrise (the usual rule, called udaya tithi) on Thursday, 19 April 2046, so that is the day of Mahavir Jayanti.
How the date is fixed
Mahavir Jayanti falls on the thirteenth day of the bright half of the lunar month Chaitra (Shukla Trayodashi). The date is the day on which that tithi is running at sunrise (the usual rule, called udaya tithi).
About
Mahavir Jayanti falls on the thirteenth tithi of the bright half of Chaitra, usually in late March or April. Jain tradition records the birth at Kundagrama near Vaishali in 599 BCE, in Uttara Phalguni nakshatra. The tithi at sunrise fixes the day, and it is a gazetted holiday in India. Both Shvetambara and Digambara communities keep the same date, which is uncommon among Jain observances.
How it is observed
Processions with the Tirthankara's image, abhisheka at Jain temples and readings from the Kalpa Sutra.