Answer

In the Digambara tradition, Bhagwan Mahavir’s Janma Kalyanak is commonly placed in 615 BCE by counting backward from the traditional date of his Nirvana.

The basic calculation is:

• Bhagwan Mahavir attained Nirvana in 527 BCE.
• He lived for 72 years.
• So, 527 BCE + 72 years = 599 BCE by simple arithmetic.

However, the Digambara traditional date is often given as 615 BCE because it follows a different traditional chronological reckoning connected with the timing of Mahavir’s life events and calendrical calculations preserved in the Digambara tradition.

Explanation

According to the commonly accepted Jain tradition:

• Bhagwan Mahavir’s lifespan was 72 years.
• He renounced worldly life at the age of 30.
• He performed intense tapas for about 12 years.
• He attained Kevaljnan at about 42.
• He preached for about 30 years.
• He attained Nirvana at 72.

The difference between 599 BCE and 615 BCE arises because different Jain traditions and historical systems use different chronological anchors and calendar conventions.

Among many Śvetāmbara sources, the birth year is often given as 599 BCE and Nirvana as 527 BCE. In Digambara tradition, 615 BCE is also found for Janma Kalyanak, with Nirvana placed around 543 BCE in that reckoning:

• 615 BCE − 72 years = approximately 543 BCE

Since BCE years count downward as time moves forward, a birth in 615 BCE and Nirvana after 72 years gives 543 BCE.

Spiritual Understanding

For Jain Dharma, the exact historical BCE year is secondary to the spiritual meaning of Janma Kalyanak.

Bhagwan Mahavir’s birth is celebrated because it marks the appearance of the 24th Tirthankar of the present avasarpini era, who revived the path of:

• Ahimsa
• Aparigraha
• Anekantvad
• Self-restraint
• Liberation through right faith, right knowledge, and right conduct

Takeaway

Digambaras calculate 615 BCE for Bhagwan Mahavir’s Janma Kalyanak by using a traditional chronology in which his Nirvana is placed around 543 BCE and his lifespan is 72 years. Other Jain traditions often use 599 BCE birth and 527 BCE Nirvana, which is why both dates are seen in Jain literature.