Answer

Mahavir Bhagwan’s birth is traditionally celebrated on Chaitra Sud Teras as Mahavir Janma Kalyanak.

If you mean “what time should Mahavir Janma Kalyanak be celebrated tomorrow?”, the exact time depends on the local Jain panchang, your city, and the tradition followed by your Sangh.

Explanation

In Jain tradition, Mahavir Swami was born in the Ikshvaku dynasty to:

• Father: King Siddharth
• Mother: Queen Trishala
• Birthplace: Kundalpur / Kshatriyakund, traditionally associated with Vaishali region

The birth event is remembered as one of the five Kalyanaks of a Tirthankar.

Takeaway

For the exact timing of tomorrow’s celebration, please check with your local Jain temple or Sangh panchang, because Jain festival timings can vary by location and calendar calculation.