In Jainism, "Choviyar" (also spelled Chauvihar or Chauvihar) refers to the practice of not consuming any food or water after sunset or after a specific time in the evening. The exact time for Choviyar depends on the local sunset time and the particular tradition followed (Shwetambar or Digambar).

For Bombay (Mumbai), generally:

• Shwetambar Jains often observe Choviyar at sunset or around 48 minutes before sunset.
• Digambar Jains may observe it at sunset.

As sunset time changes daily, you should consult a reliable Jain Panchang (calendar) or your local Jain temple for the precise Choviyar time each day. Typically in Mumbai, sunset is between 6:30 pm and 7:15 pm depending on the season. For accurate practice, check the day's sunset time and observe Choviyar accordingly.

Summary: Check today's sunset time in Bombay. Choviyar is observed at or slightly before sunset, as per your tradition.

If you need the exact Choviyar time for today, please refer to your local Jain Panchang or temple notice.