There is no time difference between Ho Chi Minh City and Hanoi. Both cities use Indochina Time (ICT, UTC+7). When it's 9:00 AM in Ho Chi Minh City, it's also 9:00 AM in Hanoi.
Vietnam uses a single timezone across the entire country, so all major cities remain synchronized year-round.
Any time works! Since both cities share the same timezone, you can schedule calls during standard business hours (9:00 AM - 5:00 PM) without any time conversion needed.
Ho Chi Minh City and Hanoi are Vietnam's two largest cities, connected by domestic flights taking about 2 hours. Ho Chi Minh City is the commercial hub in the south, while Hanoi is the capital and political center in the north.