Offset
The time difference between Boise and Johannesburg is 8 hours.
Boise (MDT) is behind Johannesburg (SAST).
MDT: UTC-6
SAST: UTC+2
Boise is currently observing daylight saving time; Johannesburg is not.
When to schedule
Standard business hours (9 AM–5 PM, Mon–Fri) in Boise and Johannesburg don't overlap on the same weekday. Johannesburg is 8 hours ahead of Boise.
With some flexibility, there’s a workable window outside standard hours:
- 7 AM–12 PM in Boise (3 PM–8 PM in Johannesburg) — suggest 9:00 AM Boise (5:00 PM Johannesburg).
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
South Africa
- New Year's DayThu, Jan 1
- Human Rights DaySat, Mar 21
- Good FridayFri, Apr 3
- Family DayMon, Apr 6
- Freedom DayMon, Apr 27
- Workers' DayFri, May 1
- Youth DayTue, Jun 16
- National Women's DayMon, Aug 10
- Heritage DayThu, Sep 24
- Day of ReconciliationWed, Dec 16
- Christmas DayFri, Dec 25
- Day of GoodwillSat, Dec 26
About these zones
Boise uses Mountain Time (MST, or MDT). To call United States, dial +1.
Johannesburg uses South Africa Time (SAST). To call South Africa, dial +27.
Johannesburg is approximately 10,100 miles east of Boise.
Quick reference
Full 24-hour conversion table — tap any time to open it in the converter.
| Boise | Johannesburg | Day |
|---|---|---|
| 12:00 am | 8:00 am | Same day |
| 1:00 am | 9:00 am | Same day |
| 2:00 am | 10:00 am | Same day |
| 3:00 am | 11:00 am | Same day |
| 4:00 am | 12:00 pm | Same day |
| 5:00 am | 1:00 pm | Same day |
| 6:00 am | 2:00 pm | Same day |
| 7:00 am | 3:00 pm | Same day |
| 8:00 am | 4:00 pm | Same day |
| 9:00 am | 5:00 pm | Same day |
| 10:00 am | 6:00 pm | Same day |
| 11:00 am | 7:00 pm | Same day |
| 12:00 pm | 8:00 pm | Same day |
| 1:00 pm | 9:00 pm | Same day |
| 2:00 pm | 10:00 pm | Same day |
| 3:00 pm | 11:00 pm | Same day |
| 4:00 pm | 12:00 am | +1 day |
| 5:00 pm | 1:00 am | +1 day |
| 6:00 pm | 2:00 am | +1 day |
| 7:00 pm | 3:00 am | +1 day |
| 8:00 pm | 4:00 am | +1 day |
| 9:00 pm | 5:00 am | +1 day |
| 10:00 pm | 6:00 am | +1 day |
| 11:00 pm | 7:00 am | +1 day |
Daylight saving time
Boise observes daylight saving time; Johannesburg does not. The offset between the two zones changes when Boise 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
- 6:05 AM
- Sunset
- 9:24 PM
- Day length
- 15h 20m
- Sunrise
- 6:51 AM
- Sunset
- 5:24 PM
- Day length
- 10h 33m
Cities in these zones
Other cities in South Africa Time
Browse all cities to see the current local time anywhere.
Airports in these zones
Airports in Mountain Time
- BOI
Airports in South Africa Time
- HLA
- JNB
- CPT
- DUR
Related conversions
Common conversions
- What is 9:00 am Boise in Johannesburg?
- 9:00 am Boise is 5:00 pm Johannesburg.
- What is 12:00 pm Boise in Johannesburg?
- 12:00 pm Boise is 8:00 pm Johannesburg.
- What is 12:30 pm Boise in Johannesburg?
- 12:30 pm Boise is 8:30 pm Johannesburg.
- What is 2:00 pm Boise in Johannesburg?
- 2:00 pm Boise is 10:00 pm Johannesburg.
- What is 5:00 pm Boise in Johannesburg?
- 5:00 pm Boise is 1:00 am Johannesburg, the next day.
- What is 11:30 pm Boise in Johannesburg?
- 11:30 pm Boise is 7:30 am Johannesburg, the next day.