Answer

In a Tivihar Upvas, you avoid all food and liquids except water. You may drink boiled and properly cooled water during the permitted daytime period.

Usually, water is taken only from after sunrise until before sunset, according to Jain practice.

Explanation

In Jain Dharma:

• Chauvihar Upvas means no food and no water.
• Tivihar Upvas means no food, but water is allowed.

So if you are doing Tivihar Upvas, you can drink water during the day, but not after sunset.

Many people follow the rule that water should be:

• Boiled
• Cooled naturally
• Consumed only during the allowed daylight time

Takeaway

For Tivihar Upvas, you can start drinking water after sunrise and should stop before sunset. For exact timing, follow your local Jain calendar and the guidance of your guru or sangh.