Offset
The time difference between Mountain Time and Antananarivo is 9 hours.
Mountain Time (MDT) is behind Antananarivo (GMT+3).
MDT: UTC-6
GMT+3: UTC+3
Mountain Time is currently observing daylight saving time; Antananarivo is not.
When to schedule
Standard business hours (9 AM–5 PM, Mon–Fri) in Mountain Time and Antananarivo don't overlap on the same weekday. Antananarivo is 9 hours ahead of Mountain Time.
With some flexibility, there’s a workable window outside standard hours:
- 7 AM–11 AM in Mountain Time (4 PM–8 PM in Antananarivo) — suggest 9:00 AM Mountain Time (6:00 PM Antananarivo).
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
Madagascar
- New Year's DayThu, Jan 1
- Martyrs' DaySun, Mar 29
- Easter MondayMon, Apr 6
- Labour DayFri, May 1
- Ascension DayThu, May 14
- Whit MondayMon, May 25
- Independence DayFri, Jun 26
- Assumption DaySat, Aug 15
- All Saints' DaySun, Nov 1
- Christmas DayFri, Dec 25
About these zones
Mountain Time is also known as MST, or MDT. To call United States, dial +1.
Antananarivo uses East Africa Time. To call Madagascar, dial +261.
Antananarivo is approximately 10,250 miles northeast of Mountain Time.
Quick reference
Full 24-hour conversion table — tap any time to open it in the converter.
| MST | Antananarivo | Day |
|---|---|---|
| 12:00 am | 9:00 am | Same day |
| 1:00 am | 10:00 am | Same day |
| 2:00 am | 11:00 am | Same day |
| 3:00 am | 12:00 pm | Same day |
| 4:00 am | 1:00 pm | Same day |
| 5:00 am | 2:00 pm | Same day |
| 6:00 am | 3:00 pm | Same day |
| 7:00 am | 4:00 pm | Same day |
| 8:00 am | 5:00 pm | Same day |
| 9:00 am | 6:00 pm | Same day |
| 10:00 am | 7:00 pm | Same day |
| 11:00 am | 8:00 pm | Same day |
| 12:00 pm | 9:00 pm | Same day |
| 1:00 pm | 10:00 pm | Same day |
| 2:00 pm | 11:00 pm | Same day |
| 3:00 pm | 12:00 am | +1 day |
| 4:00 pm | 1:00 am | +1 day |
| 5:00 pm | 2:00 am | +1 day |
| 6:00 pm | 3:00 am | +1 day |
| 7:00 pm | 4:00 am | +1 day |
| 8:00 pm | 5:00 am | +1 day |
| 9:00 pm | 6:00 am | +1 day |
| 10:00 pm | 7:00 am | +1 day |
| 11:00 pm | 8:00 am | +1 day |
Daylight saving time
Mountain Time observes daylight saving time; Antananarivo 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
- 5:49 AM
- Sunset
- 8:25 PM
- Day length
- 14h 36m
- Sunrise
- 6:23 AM
- Sunset
- 5:31 PM
- Day length
- 11h 8m
Daylight overlap: 2h 42m — 5:49 AM–8:31 AM in Mountain Time (2:49 PM–5:31 PM in Antananarivo). Both locations are in daylight during this window.
Cities in these zones
Cities in Mountain 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 East Africa Time
- TNR
Related conversions
Common conversions
- What is 9:00 am MST in Antananarivo?
- 9:00 am MST is 6:00 pm Antananarivo.
- What is 12:00 pm MST in Antananarivo?
- 12:00 pm MST is 9:00 pm Antananarivo.
- What is 12:30 pm MST in Antananarivo?
- 12:30 pm MST is 9:30 pm Antananarivo.
- What is 2:00 pm MST in Antananarivo?
- 2:00 pm MST is 11:00 pm Antananarivo.
- What is 5:00 pm MST in Antananarivo?
- 5:00 pm MST is 2:00 am Antananarivo, the next day.
- What is 11:30 pm MST in Antananarivo?
- 11:30 pm MST is 8:30 am Antananarivo, the next day.