Houston is 10.5 hours behind Mumbai

There is no standard 8-to-6 overlap. Someone joins early or late.

Mumbai and Houston are 10.5 hours apart, and that gap is wide enough that their normal 9-to-5 workdays never quite touch. If you meet regularly, fix one off-hours slot and rotate it between Mumbai and Houston so the burden doesn't fall on one team. These times hold for most of the year, but Houston's daylight saving (which Mumbai doesn't use) shifts them by an hour twice annually.