What is HST in SAST?
South Africa Standard Time is 12 hours ahead
Hawaii Standard Time is on UTC−10:00 and South Africa Standard Time is on UTC+2:00 right now. That gap holds all year, because both zones change their clocks together.
- Time in Honolulu
- 4:57 pm
- Time in Johannesburg
- 4:57 am
- Difference
- +12 h
- Next clock change
- Neither zone
Convert a time
SAST — South Africa Standard Time
4:00 am
Wed, the next day
Daylight saving
Hawaii Standard Time
Hawaii Standard Time stays on HST all year, so its offset from UTC never moves.
South Africa Standard Time
South Africa Standard Time stays on SAST all year, so its offset from UTC never moves.
HST to SAST conversion table
Every hour of Tuesday, September 22, 2026, converted from Hawaii Standard Time to South Africa Standard Time. 12 of the 24 hours fall on a different calendar day in Johannesburg, which is marked.
- 12:00 am HST
- 12:00 pm SAST
- 1:00 am HST
- 1:00 pm SAST
- 2:00 am HST
- 2:00 pm SAST
- 3:00 am HST
- 3:00 pm SAST
- 4:00 am HST
- 4:00 pm SAST
- 5:00 am HST
- 5:00 pm SAST
- 6:00 am HST
- 6:00 pm SAST
- 7:00 am HST
- 7:00 pm SAST
- 8:00 am HST
- 8:00 pm SAST
- 9:00 am HST
- 9:00 pm SAST
- 10:00 am HST
- 10:00 pm SAST
- 11:00 am HST
- 11:00 pm SAST
- 12:00 pm HST
- 12:00 am SAST+1 day
- 1:00 pm HST
- 1:00 am SAST+1 day
- 2:00 pm HST
- 2:00 am SAST+1 day
- 3:00 pm HST
- 3:00 am SAST+1 day
- 4:00 pm HST
- 4:00 am SAST+1 day
- 5:00 pm HST
- 5:00 am SAST+1 day
- 6:00 pm HST
- 6:00 am SAST+1 day
- 7:00 pm HST
- 7:00 am SAST+1 day
- 8:00 pm HST
- 8:00 am SAST+1 day
- 9:00 pm HST
- 9:00 am SAST+1 day
- 10:00 pm HST
- 10:00 am SAST+1 day
- 11:00 pm HST
- 11:00 am SAST+1 day
Scheduling between the two
There is no overlap between a nine-to-six working day in Honolulu and one in Johannesburg — the gap is too wide. A call has to sit early or late for one side. Early morning in Honolulu is the usual compromise, since that is late afternoon or evening in Johannesburg.
Hawaii Standard Time (HST) is used in all of Hawaii, which does not observe daylight saving