Ulaanbaatar, Mongolia Honolulu, United States

Ulaanbaatar is in the +08 timezone (UTC+8) and Honolulu is in the HST timezone (UTC-10). The time difference between them is 18 hours.

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

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

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