Rio de Janeiro, Brazil Hanoi, Vietnam

Rio de Janeiro is in the -03 timezone (UTC-3) and Hanoi is in the +07 timezone (UTC+7). The time difference between them is 10 hours.

Use the timeline above to find overlapping business hours between Rio de Janeiro and Hanoi. The "Best time to meet" card highlights the window where both cities are within working hours (9 AM – 6 PM local time).

Neither Rio de Janeiro nor Hanoi observes Daylight Saving Time, so the time difference remains constant throughout the year.

Click the pencil icon next to the Rio de Janeiro clock and type any time. The Hanoi clock will update instantly, showing the exact corresponding time. You can also pick a date to account for DST changes.