Offset
The time difference between Johannesburg and Boise is 8 hours.
Johannesburg (SAST) is ahead of Boise (MDT).
SAST: UTC+2
MDT: UTC-6
Boise is currently observing daylight saving time; Johannesburg is not.
When to schedule
Standard business hours (9 AM–5 PM, Mon–Fri) in Johannesburg and Boise don't overlap on the same weekday. Boise is 8 hours behind Johannesburg.
With some flexibility, there’s a workable window outside standard hours:
- 3 PM–8 PM in Johannesburg (7 AM–12 PM in Boise) — suggest 5:00 PM Johannesburg (9:00 AM Boise).
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.
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
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
Johannesburg uses South Africa Time (SAST). To call South Africa, dial +27.
Boise uses Mountain Time (MST, or MDT). To call United States, dial +1.
Boise is approximately 10,100 miles northwest of Johannesburg.
Quick reference
Full 24-hour conversion table — tap any time to open it in the converter.
| Johannesburg | Boise | Day |
|---|---|---|
| 12:00 am | 4:00 pm | -1 day |
| 1:00 am | 5:00 pm | -1 day |
| 2:00 am | 6:00 pm | -1 day |
| 3:00 am | 7:00 pm | -1 day |
| 4:00 am | 8:00 pm | -1 day |
| 5:00 am | 9:00 pm | -1 day |
| 6:00 am | 10:00 pm | -1 day |
| 7:00 am | 11:00 pm | -1 day |
| 8:00 am | 12:00 am | Same day |
| 9:00 am | 1:00 am | Same day |
| 10:00 am | 2:00 am | Same day |
| 11:00 am | 3:00 am | Same day |
| 12:00 pm | 4:00 am | Same day |
| 1:00 pm | 5:00 am | Same day |
| 2:00 pm | 6:00 am | Same day |
| 3:00 pm | 7:00 am | Same day |
| 4:00 pm | 8:00 am | Same day |
| 5:00 pm | 9:00 am | Same day |
| 6:00 pm | 10:00 am | Same day |
| 7:00 pm | 11:00 am | Same day |
| 8:00 pm | 12:00 pm | Same day |
| 9:00 pm | 1:00 pm | Same day |
| 10:00 pm | 2:00 pm | Same day |
| 11:00 pm | 3:00 pm | Same 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
- 6:51 AM
- Sunset
- 5:24 PM
- Day length
- 10h 33m
- Sunrise
- 6:05 AM
- Sunset
- 9:24 PM
- Day length
- 15h 20m
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 South Africa Time
- HLA
- JNB
- CPT
- DUR
Airports in Mountain Time
- BOI
Related conversions
Common conversions
- What is 9:00 am Johannesburg in Boise?
- 9:00 am Johannesburg is 1:00 am Boise.
- What is 12:00 pm Johannesburg in Boise?
- 12:00 pm Johannesburg is 4:00 am Boise.
- What is 12:30 pm Johannesburg in Boise?
- 12:30 pm Johannesburg is 4:30 am Boise.
- What is 2:00 pm Johannesburg in Boise?
- 2:00 pm Johannesburg is 6:00 am Boise.
- What is 5:00 pm Johannesburg in Boise?
- 5:00 pm Johannesburg is 9:00 am Boise.
- What is 11:30 pm Johannesburg in Boise?
- 11:30 pm Johannesburg is 3:30 pm Boise.