Hanoi, Vietnam Ulaanbaatar, Mongolia

Hanoi is in the +07 timezone (UTC+7) and Ulaanbaatar is in the +08 timezone (UTC+8). The time difference between them is 1 hour.

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

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

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