Offset
The time difference between Mountain Time and Biên Hòa is 13 hours.
Mountain Time (MDT) is behind Biên Hòa (ICT).
MDT: UTC-6
ICT: UTC+7
Mountain Time is currently observing daylight saving time; Biên Hòa is not.
When to schedule
Standard business hours (9 AM–5 PM, Mon–Fri) in Mountain Time and Biên Hòa don't overlap on the same weekday. Biên Hòa is 13 hours ahead of Mountain Time.
With some flexibility, there’s a workable window outside standard hours:
- 6 PM–8 PM in Mountain Time (7 AM–9 AM the next day in Biên Hòa) — suggest 7:00 PM Mountain Time (8:00 AM Biên Hòa).
This means an early start or late finish for one side, but it’s a reasonable slot for a one-off meeting.
This window may shift by an hour during daylight saving time.
Public holidays in 2026
National public holidays can affect availability — a counterpart is likely off work on their own holidays, so it's worth planning meetings and deadlines around them.
United States
- New Year's DayThu, Jan 1
- Martin Luther King, Jr. DayMon, Jan 19
- Presidents DayMon, Feb 16
- Memorial DayMon, May 25
- Juneteenth National Independence DayFri, Jun 19
- Independence DayFri, Jul 3
- Labour DayMon, Sep 7
- Columbus DayMon, Oct 12
- Veterans DayWed, Nov 11
- Thanksgiving DayThu, Nov 26
- Christmas DayFri, Dec 25
Vietnam
- New Year's DayThu, Jan 1
- Reunification DayThu, Apr 30
- Labour DayFri, May 1
- National DayWed, Sep 2
About these zones
Mountain Time is also known as MST, or MDT. To call United States, dial +1.
Biên Hòa uses Indochina Time (ICT). To call Vietnam, dial +84.
Biên Hòa is approximately 8,400 miles northwest of Mountain Time.
Quick reference
Full 24-hour conversion table — tap any time to open it in the converter.
| MST | Biên Hòa | Day |
|---|---|---|
| 12:00 am | 1:00 pm | Same day |
| 1:00 am | 2:00 pm | Same day |
| 2:00 am | 3:00 pm | Same day |
| 3:00 am | 4:00 pm | Same day |
| 4:00 am | 5:00 pm | Same day |
| 5:00 am | 6:00 pm | Same day |
| 6:00 am | 7:00 pm | Same day |
| 7:00 am | 8:00 pm | Same day |
| 8:00 am | 9:00 pm | Same day |
| 9:00 am | 10:00 pm | Same day |
| 10:00 am | 11:00 pm | Same day |
| 11:00 am | 12:00 am | +1 day |
| 12:00 pm | 1:00 am | +1 day |
| 1:00 pm | 2:00 am | +1 day |
| 2:00 pm | 3:00 am | +1 day |
| 3:00 pm | 4:00 am | +1 day |
| 4:00 pm | 5:00 am | +1 day |
| 5:00 pm | 6:00 am | +1 day |
| 6:00 pm | 7:00 am | +1 day |
| 7:00 pm | 8:00 am | +1 day |
| 8:00 pm | 9:00 am | +1 day |
| 9:00 pm | 10:00 am | +1 day |
| 10:00 pm | 11:00 am | +1 day |
| 11:00 pm | 12:00 pm | +1 day |
Daylight saving time
Mountain Time observes daylight saving time; Biên Hòa does not. The offset between the two zones changes when Mountain Time transitions: on Sunday, November 1, 2026, clocks fall back from MDT to MST.
See the daylight saving time page for transition dates across every time zone.
Daylight today
- Sunrise
- 5:51 AM
- Sunset
- 8:23 PM
- Day length
- 14h 33m
- Sunrise
- 5:40 AM
- Sunset
- 6:20 PM
- Day length
- 12h 40m
Daylight overlap: 3h 43m — 4:40 PM–8:23 PM in Mountain Time (5:40 AM–9:23 AM in Biên Hòa). Both locations are in daylight during this window.
Cities in these zones
Cities in Mountain Time
Other cities in Indochina Time
Browse all cities to see the current local time anywhere.
Airports in these zones
Airports in Mountain Time
- BJC
- DEN
- OGD
- SLC
Airports in Indochina Time
- SGN
- VCA
- DAD
Related conversions
Common conversions
- What is 9:00 am MST in Biên Hòa?
- 9:00 am MST is 10:00 pm Biên Hòa.
- What is 12:00 pm MST in Biên Hòa?
- 12:00 pm MST is 1:00 am Biên Hòa, the next day.
- What is 12:30 pm MST in Biên Hòa?
- 12:30 pm MST is 1:30 am Biên Hòa, the next day.
- What is 2:00 pm MST in Biên Hòa?
- 2:00 pm MST is 3:00 am Biên Hòa, the next day.
- What is 5:00 pm MST in Biên Hòa?
- 5:00 pm MST is 6:00 am Biên Hòa, the next day.
- What is 11:30 pm MST in Biên Hòa?
- 11:30 pm MST is 12:30 pm Biên Hòa, the next day.