Ho Chi Minh City is 11 hours ahead of Santiago

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

There's no shared 9-to-5 between Santiago and Ho Chi Minh City; at 11 hours apart, one city's workday is the other's evening or night. Your best bet is one team taking an early-morning or late-evening call — alternating who stretches keeps it fair over time. These times hold for most of the year, but Santiago's daylight saving (which Ho Chi Minh City doesn't use) shifts them by an hour twice annually.