Offset
The time difference between Biên Hòa and Mountain Time is 13 hours.
Biên Hòa (ICT) is ahead of Mountain Time (MDT).
ICT: UTC+7
MDT: UTC-6
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 Biên Hòa and Mountain Time don't overlap on the same weekday. Mountain Time is 13 hours behind Biên Hòa.
Realistic options: hand off asynchronously, or stretch one side by an hour to catch the other team at the start or end of their day.
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.
Vietnam
- New Year's DayThu, Jan 1
- Reunification DayThu, Apr 30
- Labour DayFri, May 1
- National DayWed, Sep 2
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
About these zones
Biên Hòa uses Indochina Time (ICT). To call Vietnam, dial +84.
Mountain Time is also known as MST, or MDT. To call United States, dial +1.
Mountain Time is approximately 8,400 miles northeast of Biên Hòa.
Quick reference
Full 24-hour conversion table — tap any time to open it in the converter.
| Biên Hòa | MST | Day |
|---|---|---|
| 12:00 am | 11:00 am | -1 day |
| 1:00 am | 12:00 pm | -1 day |
| 2:00 am | 1:00 pm | -1 day |
| 3:00 am | 2:00 pm | -1 day |
| 4:00 am | 3:00 pm | -1 day |
| 5:00 am | 4:00 pm | -1 day |
| 6:00 am | 5:00 pm | -1 day |
| 7:00 am | 6:00 pm | -1 day |
| 8:00 am | 7:00 pm | -1 day |
| 9:00 am | 8:00 pm | -1 day |
| 10:00 am | 9:00 pm | -1 day |
| 11:00 am | 10:00 pm | -1 day |
| 12:00 pm | 11:00 pm | -1 day |
| 1:00 pm | 12:00 am | Same day |
| 2:00 pm | 1:00 am | Same day |
| 3:00 pm | 2:00 am | Same day |
| 4:00 pm | 3:00 am | Same day |
| 5:00 pm | 4:00 am | Same day |
| 6:00 pm | 5:00 am | Same day |
| 7:00 pm | 6:00 am | Same day |
| 8:00 pm | 7:00 am | Same day |
| 9:00 pm | 8:00 am | Same day |
| 10:00 pm | 9:00 am | Same day |
| 11:00 pm | 10:00 am | Same 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
- 5:39 AM
- Sunset
- 6:20 PM
- Day length
- 12h 41m
- Sunrise
- 5:49 AM
- Sunset
- 8:25 PM
- Day length
- 14h 36m
Daylight overlap: 3h 45m — 5:39 AM–9:25 AM in Biên Hòa (4:39 PM–8:25 PM in Mountain Time). Both locations are in daylight during this window.
Cities in these zones
Other cities in Indochina Time
Cities in Mountain Time
Browse all cities to see the current local time anywhere.
Airports in these zones
Airports in Indochina Time
- SGN
- VCA
- DAD
Airports in Mountain Time
- BJC
- DEN
- OGD
- SLC
Related conversions
Common conversions
- What is 9:00 am Biên Hòa in MST?
- 9:00 am Biên Hòa is 8:00 pm MST, the previous day.
- What is 12:00 pm Biên Hòa in MST?
- 12:00 pm Biên Hòa is 11:00 pm MST, the previous day.
- What is 12:30 pm Biên Hòa in MST?
- 12:30 pm Biên Hòa is 11:30 pm MST, the previous day.
- What is 2:00 pm Biên Hòa in MST?
- 2:00 pm Biên Hòa is 1:00 am MST.
- What is 5:00 pm Biên Hòa in MST?
- 5:00 pm Biên Hòa is 4:00 am MST.
- What is 11:30 pm Biên Hòa in MST?
- 11:30 pm Biên Hòa is 10:30 am MST.