Answer

If you have done Tivihar Upvas, you may consume food the next day only after sunrise, usually after doing proper pratikraman / prayer / pachakkhan parna according to your tradition.

You should not eat before sunrise.

Explanation

In Tivihar Upvas, one gives up food for the day, but water may be allowed according to the vow taken. The fast is completed the next morning with parna.

Generally:

• Wait until sunrise the next day.
• Do your regular religious duties as per your family or sangh tradition.
• Then do parna with suitable simple food or drink.

If you had taken a specific pachakkhan with a particular time or condition, follow that vow exactly.

Spiritual Understanding

In Jain Dharma, fasting is not only about avoiding food. It is a practice of self-control, awareness, and purification of karma. Completing the fast properly through parna is also important.

Takeaway

For Tivihar Upvas, eat the next day after sunrise, after completing the proper religious procedure followed in your tradition.