There is no standard 8-to-6 overlap. Someone joins early or late.
Given Rio de Janeiro is 10 hours behind Hanoi, the realistic answer is that there's no convenient shared slot during normal business hours. Catch the edges of the day: the last hour for Hanoi or the first hour for Rio de Janeiro is usually the least painful option.
Local time
12am
1am
2am
3am
4am
5am
6am
7am
8am
9am
10am
11am
12pm
1pm
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4pm
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11pm
Hanoi
Asia/Ho Chi Minh
Rio de Janeiro
America/Sao Paulo
Frequently Asked Questions
What is the time difference between Hanoi and Rio de Janeiro?
Rio de Janeiro is 10 hours behind Hanoi.
What are the best overlapping working hours between Hanoi and Rio de Janeiro?
Unfortunately, there are no standard overlapping working hours (8 AM to 6 PM) between Hanoi and Rio de Janeiro. You will likely need to schedule meetings outside of regular office hours.
How many hours overlap between Hanoi and Rio de Janeiro during a typical workday?
Unfortunately, there are no overlapping work hours. Someone will usually need to join earlier or later than a normal workday.
Does Daylight Saving Time affect the time difference between Hanoi and Rio de Janeiro?
Neither Hanoi nor Rio de Janeiro observes Daylight Saving Time, so the time difference remains consistent year-round.