Pacific Time, and a desk that answers before breakfast
Sacramento keeps Pacific Time, UTC−8, and moves an hour forward from the second Sunday in March to the first Sunday in November. India is twelve and a half hours ahead in summer and thirteen and a half in winter, so 09:00 in Sacramento is 21:30 IST from March to November and 22:30 IST the rest of the year.
That gap is wide enough to work in your favour. A handler who writes at 16:00 Sacramento time reaches India at 04:30 or 05:30 the next morning; your team answers through the Indian working day, inside the 24-hour window the question opened, and the reply is waiting when Sacramento wakes.
What it rules out is live back-and-forth during Sacramento's office hours, which fall in the Indian night. Let templates carry the events, such as a remittance sent or a test lot passed, and keep people for the questions that come back.