Answer

If you mean Navkarsi / Naukarsi in Jain practice, then in Mumbai today it ends at about 6:49 AM IST. Mumbai sunrise today is 6:01 AM, and Naukarsi is observed for 48 minutes after sunrise. ( panchang.vastucart.in)

Explanation

So the usual Jain observance is:

• Sunrise: 6:01 AM
• Navkarsi/Naukarsi ends: 6:49 AM IST ( panchang.vastucart.in)

Spiritual Understanding

This time is kept with discipline and reverence in Jain practice, especially regarding food and water after sunrise. ( jainknowledge.com)

Takeaway

For Mumbai today, you can consider 6:49 AM IST as the Navkarsi/Naukarsi cutoff. ( panchang.vastucart.in)