Best time to call
Shanghai is 3 hours ahead of Mumbai. Here are the call windows that respect both your day in Mumbai (India) and theirs in Shanghai (China), plus the daylight saving and holiday traps to watch.
9 AM Mumbai
= 12 PM Shanghai
9 AM in Mumbai = 12 PM in Shanghai, right around their lunch, so confirm they are at a desk.
10 AM Mumbai
= 1 PM Shanghai
10 AM in Mumbai = 1 PM in Shanghai, right around their lunch, so confirm they are at a desk.
11 AM Mumbai
= 2 PM Shanghai
11 AM in Mumbai = 2 PM in Shanghai, after their lunch and before the late-afternoon slump.
Both cities are loaded with Mumbai as the anchor. Adjust the day or hours to see the overlap shift, including around daylight saving transitions.
Sorted by participants in business hours
Green = inside 9:00–17:00
Shanghai is 3 hours ahead of Mumbai. From your desk in Mumbai, that means your morning is already their afternoon, and the window where both teams are at their desks is narrower than it looks. The cleanest single slot is 9 AM your time, which lands at 12 PM in Shanghai.
At 3 hours apart, you have a generous shared working day. Most of your morning lines up with most of theirs, so the choice is less about finding any overlap and more about hitting the callee's best energy. Aim for their mid-morning rather than their lunch or their wind-down.
The recommended slots above are computed against today's offset, which is the safe default. The trap is the twice-a-year daylight saving changeover: Mumbai and Shanghai do not necessarily move their clocks on the same weekend, so for a few weeks each spring and autumn the gap can shift by an hour and every recurring invite quietly misfires. If your call is near a transition date, confirm the exact wall-clock time on both ends rather than trusting the difference.
On these dates both India and China are likely off, so do not schedule.